Click start>run type in msconfig. To remove items in this procedure, click on the startup tab and remove items that do not need to be loaded at startup. If you're not sure which ones, post up what you have in there and someone will help you.
There are ways to speed up your pc, depending on the modem you use, and what kind of connection you have. Also, a p-633 isn't so slow, I know people running 233's that we have "helped" to move quicker, faster than some 1ghz machines
And, it's not that Windows ME is a totally bad operating system, it just has more issues and patches than good points. But any os, from 95 to xp, can be "made" to do things that microsoft did not intend.