Sean those clips do like to break no matter how you try and remove them sometime's you are lucky and one or two clips survive the way to do it is to use a screwdriver under the bead and gently pick up or use your hands slowly moving it from side to side and up all in one motion.Be careful not to push the screwdriver on to the screen for it will crack.
I used 2 putty knives to remove my trim pieces, the clips were so dry rotted from years of heating and cooling that most of them broke. I'll check my build pics to see if I can find them in there, if not I have a BGB manual and it shows them in there with part numbers.
they are V-shaped and pushed in the not yet hard Kit, so impossible to get out in 1 piece. like below but then in wide form : http://www.wlsheadliners.com/images/detailed/5/Trim_moulding_clips_17666.jpg
