Those cds look very good. I remember making a version of Mame that ran all the Games from (and fitted on) one cd way back. Infact Ive still got it (v36 something)
Now of course mame comes on 5 DVDs !!!!! (including chds)
There are already lots of compilations of emulators plus games going around for xbox so its probably not worth your time in making another one of those.
Have you started uploading to BippyM ftp yet? I too am interested in the Amiga cd you have and also have an ftp to 'share the love'