Well, now that we've gotten that out of the way, and I can honestly say I haven't seen Jim's videos or read Liliana's tutorial, here's how I seem to recall it being done, and I haven't tried it in a couple of years, and I'm aging, so follow me at your own risk.
Make a tube bead of your base color
Build up the ends a bit with the color you want there.
Make a thin disk in the center around it (perpendicular) with clear or transparent
Melt it in and as the disk melts down it should push out the base color too.
Like I said though, it's been a few years since I last did one (and correctly for that matter), so good luck
edit: Oh, and it was shown to me in a generic bead making class.