XP x64 htc usb modem driver

[OffUrRcker]

I need to ##DIAG and connect to my XP x64 computer. I have 32 bit xp drivers, and 64 bit vista drivers, neither of which work. Does anyone have the Diagnostic Interface and Usb Modem drivers compatible with XP x64? There's no fundamental difference between Vista and XP x64, I don't think, so if someone knows what I need to edit in the INF vista drivers to make my computer accept them, that's just as helpful.