Exhibit 31
                                  CERTIFICATION


I, Matthew Kaltenrieder, certify that:

1. I have reviewed this report on Form 10-K and all reports on Form 10-D
required to be filed in respect of the period covered by this report on Form
10-K of NovaStar Mortgage Funding Trust, Series 2006-4 (the "Exchange Act
periodic reports");

2. Based on my knowledge, the Exchange Act periodic reports, taken as a whole,
do not contain any untrue statement of a material fact or omit to state a
material fact necessary to make the statements made, in light of the
circumstances under which such statements were made, not misleading with respect
to the period covered by this report;

3. Based on my knowledge, all of the distribution, servicing and other
information required to be provided under Form 10-D for the period covered by
this report is included in the Exchange Act periodic reports;

4. Based on my knowledge and the servicer compliance statement required in this
report under Item 1123 of Regulation AB, and except as disclosed in the Exchange
Act periodic reports, the servicer has fulfilled its obligations under the
servicing agreement; and

5. All of the reports on assessment of compliance with servicing criteria for
asset-backed securities and their related attestation reports on assessment of
compliance with servicing criteria for asset-backed securities required to be
included in this report in accordance with Item 1122 of Regulation AB and
Exchange Act Rules 13a-18 and 15d-18 have been included as an exhibit to this
report, except as otherwise disclosed in this report. Any material instances of
noncompliance described in such reports have been disclosed in this report on
Form 10-K.

In giving the certifications above, I have reasonably relied on information
provided to me by the following unaffiliated parties: U.S. Bank National
Association, as Custodian and Deutsche Bank National Trust Compnay, as Trustee.


Date: March 22, 2007             /s/ Matthew Kaltenrieder
                                 ------------------------
                                 Matthew Kaltenrieder
                                 Vice President