Hi colinzim, The XP/W2K trials work differently to the Vista/Server2008 trials. Most of them are "Time Bombed" which means they stop working after a set time. If you decide to upgrade to the full version, even before your trial is over. You'll have to do a fresh install. So, adding the oem bios files won't help. You'd be better off using any OEM image you "find" on the Net, as a base.
Sure you can use the trial version, it's very easy to convert it into OEM, besides the normal files PIDGEN.DLL, DPCDLL.DL_, SETUPP.INI and the 4 OEMBIOS.* files make sure you replace SETUPREG.HIV from a retail version (This file handles the timebomb)
Are these files the same for x86 and x64? If not, can somebody please post the x64 files? Thanks! Karl