First off ALWAYS make a new folder for each track u do.. Cubase organizes all it needs 2 play the file in several subfolders... Audio/ Edits/Images, also the main folder should include the *.cpr...
Best thing 2 do now is go file/ save song 2 a new folder... name the folder and location....
From now on always make each track 2 it's own folder... so all u have 2 do is copy the all folder...
There is other ways like exporting a mixdown of each track individually...
Of course u can always clean up a bit by going into the Audio Pool, right click and remove all unused media, make edits permanent (or just bounce the track and replace the origina with the bounced 1, empty the audio recycle bin...
Don't forget that u might send yer track 2 b remixed b some1 who doesn't use SX!
MAKE SURE U BACK UP B4 U FIDGET!!!!!!!! ;)
Z