Hi
Did you go through the Add Hardware wizard in Control Panel to install them?
You should give that a try.
Did you get a CD with the devices? They will have the drivers on them if XP doesn't already.
You also will need to check if they're on the Hardware Compatibility list for XP: http://testedproducts.windowsmarketplace.com
Do you have the XP CD handy?
Did you go through the Add Hardware wizard in Control Panel to install them?
You should give that a try.
Did you get a CD with the devices? They will have the drivers on them if XP doesn't already.
You also will need to check if they're on the Hardware Compatibility list for XP: http://testedproducts.windowsmarketplace.com
Do you have the XP CD handy?