I'm assuming you mean that you'd like to make b&w prints from colour negs.

Put the neg in the enlarger,
Print as if you were using a b&w neg, (B&w paper and developer)
Evaluate your work...

Adjusting the filters will change the look of some tones, but won't really affect contrast overall (in my setup at least). I've seen some spectacular results that have an interesting contrast range and grain... I've also seen some disasterous results.

Good luck!

joe