i installed boot pro last night in addition to doing a fresh install for vista64 in the 1st 80G partition and then XP-SP2 in a 2nd 80G partition (on a Areca Raid PCIe card).
i did not do any microsoft update downloads...i then opened boot pro and checked mark the disable vista driver signature check box.
i rebooted and opened coretemp 0.96 program which i know was not compatible with vista64...coretemp worked perfectly!
on a prior install of vista64 with MS updates installed, i tried disabling vista driver signature in boot pro but it would not work even though i uninstalled those two updates noted on page one of this thread: KB932596 & KB938979
i subsequently read (not here) that these two additional updates had to be removed in order to disable the driver signature for vista64: KB941649 & KB943078...uninstalling these updates did not permit boot pro to disable the vista driver signature either.
So..it appears, at least, once the first two updates (and possibly the other two) are downloaded and applied, you can not use boot pro to disable vista driver signature...on the other hand, F8 selection at the OS selection screen in DOS will still allow the user to disable vista driver signature, with all updates installed.
i also heard a rumor that SP1 will disable anyone from disabling driver signature even via the use of the F8 key.
i hope this helps the developers to come up with a fix for boot pro to disable vista driver signature even after installing/uninstalling those updates.