Ah! THIS is why you're having problems with XP drivers, there are none from Dell. Dell did not engineer this system with XP support. See for yourself;
That's not to say XP drivers don't exist for that system's components, just that Dell never bothered with them.
Your best option is to do that full Snappy Driver Install download. If that doesn't work, you'll be limited to Windows 7 and above.
In future, if you want a rockin XP machine, get a Dell T3500 and an X5675 CPU. Paired with good GPU and 3x1GB of RAM(because X58 is triple channel and XP is 32bit), XP will run like a dream!
See PM.