I have not tried this in Win7x64, but in Win7 32-bit (x86) it works to disable the signed driver requirements in Windows 7.
[sourcecode language=”powershell” wraplines=”false” collapse=”false”]
bcdedit.exe -set loadoptions DDISABLE_INTEGRITY_CHECKS
bcdedit.exe -set TESTSIGNING ON
Please note that changing Driver Sign may be a security risk. I in no way endorse or recommend that this should be used by anyone who does not understand the risks involved.