SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 UNITED STATES FORM 10-D ASSET-BACKED ISSUER THE SECURITIES EXCHANGE ACT OF 1934 For the monthly distribution period from (Exact name of depositor as specified in its charter) (State or other jurisdiction of incorporation or organization of the issuing entity) (Telephone number, including area code) 010 1 -~~May~~ J u n e -06 0 6 Greenwich Capital Acceptance, Inc. (I.R.S. Employer Identification No.) 06-1199884 (Address of principal executive offices of issuing entity) (Zip Code) DISTRIBUTION REPORT PURSUANT TO SECTION 13 OR 13(d) OF to 02-~~Apr~~May-06 (Exact name of issuing entity as specified in its charter) Commission File Number of Issuing entity: 333-130961-04 Commission File Number of depositor: 333-130961 (Exact name of sponsor as specified in its charter) Greenwich Capital Financial Products, Inc. (Former name, former address, if changed since last report) No Change HarborView Mortgage Loan Trust 2006-4 ~~Mortgage~~c/o ~~Loan~~U.S. ~~Pass-Through~~Bank ~~Certificates~~National ~~Series 2006-4~~Association ~~600~~60 ~~Steamboat~~Livingston ~~Road Greenwich~~Avenue, CTSt. Paul, MN 55107 ~~06830 (203)~~ ~~625~~ 651-~~2700~~495-3847 ~~Delaware~~New York

Registered/reporting pursuant to (check one)

Section 15(d)

Name of exchange

Title of Class

Has the registrant (1) filed all reports required to be filed by Section 13 or 15(d) of the Securities and Exchange Act of 1934
during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has
been subject to such filing requirements for the past 90 days?

YES

(If Section 12(b))

PART I - DISTRIBUTION INFORMATION

Item 1. Distribution and Pool Performance Information.

see Exhibit-1

PART II - OTHER INFORMATION

Item 39. Exhibits.

~~On 4/28/06, the following classes of certificates in the following amounts were sold by the registrant to affiliates of the registrant in private placements in reliance on Section 4~~(2a) Exhibit-1: ofDistribution ~~the Securities Act of 1933:~~Statement

Class Initial Principal BalanceB-11 19,778,000.00B-12 15,065,465.11A-R-II 0.00

The net proceeds from the sale of these certificates were applied by the registrant toward the purchase of the mortgage loans constituting the pool assets.

The unaudited condensed consolidated balance sheets as at March 31, 2006 and December 31, 2005, the unaudited condensed consolidated statement of operations and comprehensive income for the three months ended March 31, 2006 and March 31, 2005, the unaudited condensed consolidated statements of changes in shareholder's equity for the three months ended March 31, 2006 and for the year ended December 31, 2005, and the unaudited condensed consolidated statements of cash flows for the three months ended March 31, 2006 and March 31, 2005, all of XL Capital Assurance Inc. and its subsidiary, are incorporated herein by reference from Exhibit 99.1 in XL Capital Ltd's Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2006, as filed with the Commission on May 5, 2006. The unaudited condensed balance sheets as of March 31, 2006 and December 31, 2005, the unaudited condensed statements of income and comprehensive income for the three month periods ended March 31, 2006 and March 31, 2005, the unaudited condensed statements of changes in shareholders' equity for the three month period ended March 31, 2006 and for the year ended December 31, 2005, and the unaudited condensed statements of cash flows for the three month periods ended March 31, 2006 and March 31, 2005, all of XL Financial Assurance Ltd., are incorporated herein by reference from Exhibit 99.2 in XL Capital Ltd's Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2006, as filed with the Commission on May 5, 2006.

(a) 99.1 Copy of the unaudited condensed consolidated balance sheets as at March 31, 2006 and December 31, 2005, the unaudited condensed consolidated statement of operations and comprehensive income for the three months ended March 31, 2006 and March 31, 2005, the unaudited condensed consolidated statements of changes in shareholder's equity for the three months ended March 31, 2006 and for the year ended December 31, 2005, and the unaudited condensed consolidated statements of cash flows for the three months ended March 31, 2006 and March 31, 2005, all of XL Capital Assurance Inc. and its subsidiary, are incorporated herein by reference from Exhibit 99.1 in XL Capital Ltd's Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2006, as filed with the Commission on May 5, 2006.

99.2 Copy of the unaudited condensed balance sheets as of March 31, 2006 and December 31, 2005, the unaudited condensed statements of income and comprehensive income for the three month periods ended March 31, 2006 and March 31, 2005, the unaudited condensed statements of changes in shareholders' equity for the three month period ended March 31, 2006 and for the year ended December 31, 2005, and the unaudited condensed statements of cash flows for the three month periods ended March 31, 2006 and March 31, 2005, all of XL Financial Assurance Ltd., are incorporated herein by reference from Exhibit 99.2 in XL Capital Ltd's Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2006, as filed with the Commission on May 5, 2006.

(b) Exhibit-1: Distribution Statement

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed
on its behalf by the undersigned thereunto duly authorized.

Date:

(Signature)

Thomas J Conway

Senior Vice President

Thomas J Conway

/s/ :

506/3026/2006

Greenwich Capital Acceptance, Inc.

(Depositor)

EXHIBIT INDEX

Exhibit Number

Description

EX-1

Distribution Statement

EX-99.1

Copy of the unaudited condensed consolidated balance sheets as at March 31, 2006 and December 31, 2005, the unaudited condensed consolidated statement of operations and comprehensive income for the three months ended March 31, 2006 and March 31, 2005, the unaudited condensed consolidated statements of changes in shareholder's equity for the three months ended March 31, 2006 and for the year ended December 31, 2005, and the unaudited condensed consolidated statements of cash flows for the three months ended March 31, 2006 and March 31, 2005, all of XL Capital Assurance Inc. and its subsidiary, are incorporated herein by reference from Exhibit 99.1 in XL Capital Ltd's Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2006, as filed with the Commission on May 5, 2006.

EX-99.2

Copy of the unaudited condensed balance sheets as of March 31, 2006 and December 31, 2005, the unaudited condensed statements of income and comprehensive income for the three month periods ended March 31, 2006 and March 31, 2005, the unaudited condensed statements of changes in shareholders' equity for the three month period ended March 31, 2006 and for the year ended December 31, 2005, and the unaudited condensed statements of cash flows for the three month periods ended March 31, 2006 and March 31, 2005, all of XL Financial Assurance Ltd., are incorporated herein by reference from Exhibit 99.2 in XL Capital Ltd's Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2006, as filed with the Commission on May 5, 2006

Filing Compare · Harborview 2006-4