Here's an easy way for you. Using the CV Tool draw the path you would like the webbing to follow around your character in the front view. Next go to the side view and move the points so they conform to the character's profile. Now using that same tool create a curve that represents the cross-section of the final belt. Click on the loft icon and then tweak the surface you have created. Make sure that your cross-sectional shape is a closed curve or you will have holes in your belt on the sides

Here's another way. Find an edge or Isoparm on your character that follows the direction you want the belt to go. Use that as your path and still create a cross-sectional shape for the form of the belt. Same process as above with lofting

Or you can always select the surface you want the belt on, click on the Live icon above, draw a CV or EP curve on it, select that curve and do a duplicate surface curve, loft that duplicated curve, then select the Live surface and hit the Live icon again to make it Un-Live.

There's more ways I'm sure, these are just the first three that popped into my head.

Good luck and post if you have any more trouble

Darkon