Glad to be of help
Just remember -- all my recent work is done with this technique... and I mean *ALL* !! LOL. Even the horribly complex ones, like the one I'm about to post (it's about time I put up that WoW thing I've done... even if it's been rushed) : P
Yes, there are faster ways to colour in a shape and hide the bg in the process, but every now and then, this technique just makes things perfect. Oh, especially if you're colouring for print : P ! It creates the right colour 'knock-outs' without fear of overprinting colours. Course, Illustrator does that automatically anyways but meh... nothing beats perfection.
Ah well. I'll try not to bother you with the ugly details : P Keep on vectoring!