You could get the USB2 drivers from the Asus Site. It's the nForce MoBo driver updates you want.
If you had XP, they're included with Service Pack 1, see if there's a windows update for ME from Microsoft too. If so, choose the MS one first and if that doesn't do it check the Asus Site download site for A7N8X click here (NOTE this is NOT the same and A7N8X Deluxe)
nForcers forum for Asus click here
Amd Forum for Asus click here