ChibiVader, I'm afraid I'm going to have to hurt you now. I've finally gotten around to (more) seriously tackling this IRAF stuff, along with the associated ds9, x11iraf, xpa, pgplot, etc. etc., and OUCH!
At least I'm fairly sure now that there's got to be some way within it to do stacking, per se; now I'm wondering how manual or automated the registration of the images is. Just hope I don't go off the deep end and start writing my own registration package for it if/when I find out there isn't one already.