I'm poor too but there are other ways, like...Oh yeah I'll repair ur comp bro... Aww ur graphic card is fucked up, u need a new one...
actually overclocking a TNT2 u assume more risks then with a gf2.
And not, that prog doesn't work cuz GF, GF2,GF3... etc, have a GPU and riva tnt doesn't so u can tweak that GPU...Sorry man. I dunno how to overclock a TNT2 but i did on a matrox G400 and we burnt it (we, cuz i did with a friend)