This "Knife" Tool

[Makaveli]

I understand that it is for putting in details like rib marks, rips, and abs, and such, but i cant get it to work with out putting huge gapping wholes in my dude.

Can someone explain this to me, or send me to a tutorial?

[lord]

There's an explanation in the Lightwave manual for how to use the knife tool.
But it sounds like you're knifing a SubPatched object, (huge gaping holes) because polygons must be 3 or 4 sided while working in SubPatch mode polygons with more or less sides added will suddenly appear to have disappeared.
Turn off Subpatch and those polygons should appear again so you can now fix the problem.

That's if what I think has happened has in fact happened.