Migration 98 to XP

Hi!
We are in the process of migrating our servers from WindowsNT 4.0 to Windows2000. and the clients from Win98 to WinXP.

Migrating the servers is fine. What i want to know is can i use RIS on Windows2000 server to upgrade the Win98 clients with WindowsXP. Please note, its upgrading Win98 to XP and not Win2K professional.

If possible, then is there any special care that has to be taken?

It would be good if someone can provide some guidelines

thanks and regards
kuizad