Ok: via Pacifist, I was able to rougly extract each of the components on the iLife DVD. I say roughly because some of them said they were extracting but never did. I solved the problem by further opening up each of those folders and extracting smaller bits of each of them, one at a time.
I then tested to see if what I had extracted were actually open-able apps, and it looked like they each opened up. I'm a little concerned about the location of the other supporting files associated with each app, if I ever need to reinstall from these backups, but there it is. The sloppy man's guide to dividing a DVD into two.
thanks for the tips, folks.
M1 2020 Mac mini (16G 2T) • Ventura 13.x • Dual 27" Dell S2722QC monitors • M2 2022 13" MBAir (512G 16G) •