@stopthegop:
I've found the easiest way to join the Studio16 files into one AIFF file is to use Audio Thunder... it's about a three-step process... add the files to the list, hit the button to join them, and save as AIFF. it can save to a multitude of formats and it's also blazingly fast on my A4000T-060... I bought a copy of Audio Thunder relatively cheaply from Centsible Software, they might still have some available...
Another trick to remember is that you can leave the recording format in Studio16 while working on your tracks, but if you go into Preferences in Studio16 you can change the recording format to AIFF and then record Main Out in order to get a stereo pair of AIFF files... using Audio Thunder then you can join them into a stereo AIFF. (edit: I've come to realize this is dumb advice because since Audio Thunder supports Studio16 natively, there is no need to do this anymore.)
Also there are tools on Aminet for use with the Studio16 for converting files to and from various formats and joining them, but I have not had much luck with them. I may have just been doing something wrong.
The above reply about using LAME is spot-on, though.
