With no drivers, which are probably non-existent for the older hardware, it won't function. If they are available, check each device in Device Manager and see if a new driver is available by visiting the device manufacturer's website. Just a note, you'll probably want more RAM than the XP machines have.

And check the link below for your hardware compatibility issues:

http://www.microsoft.com/windows/compatibility/windows-7/en-us/default.aspx

Hope this helps.

Grif