You should consider a few basic things the next time you send a session, just to keep things in order and to make life easy on your friend. (This has worked for me on several occasions when I've sent sessions to South America) -Mac/PC compatibility should be checked. -If you use 24 bit 44.1 you are basically safe. -Name all tracks, name all audio files, add any notes if necessary. -Clean your session from unnecessary regions and audio files. -Set disc allocation time to be almost as the lenght of your song. -Bounce to disk "print" all audio files so that all of then start at 0.00 -Print audio files with plug ins you have and your friend won't. -Print all midi tracks, converting them to audio, leave midi data. I'm sure that people can add to this list, but as I said these are some of the basics. If you are lucky and assuming you may have an average session of 24 tracks, under 5 minutes, plug ins, crossfades and at 24 bit 44.1 It could fit on a regular cd-r. If it doesn't, take some audio files and put them in another folder, name it audio folder 2, (burn separately). When you get ready to burn the session, check your session folder named XXX, it will contain 1) the session data file(nameofyoursong.pts) 2)audio folder 3)plug ins setting folder, and sometimes a fades folder. What you need to burn is the entire folder, the one it contains all of the items I mentioned above. You can keep it for posterity, you can take it to a major studio and mix, record, overdub, or send it to your friends all over the world and believe me they will open the session with no problems at all. If you are sending just an idea, scratch song, or just a few tracks.... heck do it anyways... you'll be doing it just like some of the pro's and well known guys over here. (I'm not one of them...yet)