Spearhead is Slow, Plz help
 

Everytime i play Sp or Mp for spearhead it is very slow and to laggy for me to kill anyone my system specs are:

999 MH
512 MB of RAM
GeForce 4 Ti 4200 64 Megs

Can someone tell what what i should upgrade in order to make most games on my PC run much smoother? swordfight:

it always slow for me..i have no idea why though so i stopped playing it...and it sucks

Das Blitz fire2:

hmm
 

I play SH on my dads computer and it runs soooooo freakin Nice. I have a blast playing Mp but i try it on my computer and its to slow so i have givin up playing it also, but i have the same problem for alot of my other games to so i was wondering if i needed to upgrade anything?? i was thinking my Motherboard and processor but im not to sure.