Give it up. xp is dead. if you throw all the garbage out, vista is about as fast.
i have a econobox desktop with an AMD 4core. it is very fast, and very stable. much more stable than xp. i only shut down with power failures, which is about once every month or two.
i have xerox printers. my n32's and n40's are probably 10 years old. they run fine. i have xerox 60xx color printers. they are probably 5 years old. they run fine. hp's are disposable printers. if they don't run, just throw the junk out.
i run eudora for mail. it runs, but it does have a few problems. if you run eudora, pm me, and i will help you to get it better. eudora for vista is not the same program.