If you're trying to use an OEM installation disk you'll have no end of problems if the disk doesn't match the computer
This is absolutely not true.
The disc doesn't care what computer you put it in.
Most of the OEM installations work by writing images of folders to the proper address of the folder, where the generic installation extracts cabinet files. The latter method is much more adaptable and will work with almost any machine.
This is not true either.
The only difference between a RETAIL version of XP and and OEM version of XP is that the OEM disc cannot be used as an upgrade disc.
In other words, if you have an existing OS on the machine (98 or ME), and stick an OEM disc in the cdrom while you are in windows, the XP installation will not launch.
If you stick a RETAIL XP disc into the cdrom, the XP installation will launch.