Printer driver upgrade on W2k to W2003?

I'm upgrading a W2k server to W2003 this weekend that shares printers. Most
of the users are W2k pro, but some are XP Pro. When I run the upgrade how
does it handle the existing drivers? Does it upgrade them to 2003/XP?
Also, what do I need to accomodate both desktop OS's after the upgrade? Do I
need to load two different versions of the printer drivers?


Cwhitmore