This will probably work better on the perpetual whingers (because personal attention is initially requried), thuogh you could automate it to some extent for everyone.

There are a number of semi-obscure settings in Windows that can be tweaked to gain performance. VCache size in Windows 98 is the classic one, but there are quite a few others. APC haven't put the article on their web page yet or I'd link to it.

Wade.