Mw2 FPS

Hello clord21 here again with another problem. I've been playing Mw2 (cracked ********) and I found it quite good, playing zombie mods on-line, Isnipe, etc. Anyway every time I play with my mates they do this thing, where they look into the sky, jump up and move forward and they get up. but when I do it I fail. So I asked them how do you do that, they said type com_maxfps "125" or something along the lines of that, and there using 333 fps or 250, So I tried typing com_maxfps "333" & com_maxfps "250" because I heard there good for jumping and running. But It said "Domain is any integer from 0 to 127" so I tried com_maxfps "125" so I tried this looking up in the sky and jumping forward, and It didn't worked. So I was wondering is there anyway I can play mw2 between 250 - 333 fps? If you could help would be great.

---------- Post added at 01:01 AM ---------- Previous post was at 01:01 AM ----------

I also forgot to mention that changed it from com to con