Why would XP necessarily run slower?
what we're saying is that your PC has enough
RAM /
CPU power (GHZ) to easily run XP... and that XP is a much better/faster/ easier to use OS than Windows ME. You would most likely see a FASTER computer overall by UNINSTALLING Windows ME, and installing Windows XP. Especially if you already have had those games running under ME... they'll probably run BETTER under XP. With a Pentium 3-- this will never be a raging speed-demon rig-- but it will almost certainly run better than it does now-- not worse.
Especially if you learn how to tweak XP to get the most out of your sytem while gaming.
Sure you can just close excess software while gaming in Windows ME-- will it help?? almost a sure thing. But I've HAD both Windows ME and XP-- and Windows XP blows ME away. Period.
ME was the WORST windows version EVER.
IMHO.