Something you may wish to try PRIOR to running the setup is the Microsoft XP Compatibility Utility,, this will give you a report of any hardware that is on the Hardware Compatibility List that may not work under XP,,
Being an eMachine, and knowing how some of the vendors work,, I would suggest that you do check to see that all is compatible,,
I would hate to blow away my PC, and then learn that things wont work,,
Good Luck!