How to get that "Special" weapon with sv_cheats 1 on?

[01000101]

I've just finished the game, and I was wondering if anyone knew how to get that "Special" weapon you get in the end with sv_cheats on? I've tried Impulse 101 but that doesn't work. I would like to play through the game with just that weapon 'cause it's so cool

Thanks.

 

[DeltaBlast]

sigh.. use search..

anyway, go to the final levels where you already have it, then use 'changelevel' to the map you want to play in. then use impulse 101 and there you go.