Question about tweakXP

I read some reviews that this app is not good for you, while some say it’s all good, I read some reviews from peeps here on kirupa also that suggest tweak XP… some peeps recommend xpsmoker.

I need a reliable app that allows me to tweak my xp.

my system:
P4 3.2 ghz Hyper Threading
Ram 1 gig Hyper X or something
Running on windows XP pro sp2.
I have set it up for the best performance [under mycomputer>advanced>performance setting]

I have Spybot installed, the latest Norton Internet Security, I have tweaked msconfig abit.

BUT STILL IT RUNS SO SLOWWWW!!! i remember the day I built this system… it was so freaking fast… but now…

ok Im sure there is no spyware, virus or something like that.

ideas?

thanks

note:
well compare to my notebook [p4 2.4 512mb], it’s way faster, however i can feel it’s getting slower.