I have to leave for something, so I just make a quick note.
Usualy, not always but standard is that you hold on to the .fla including the rights to sell it to anyone else after the client pay you for a license. Even if this might be old news to you, I think many make misstakes right here, I did myself. Somone wanted to pay me $500 bucks for some sucky game I had. But I thought I was to give him the full rights and I had to leave the game forever. When infact this guy just wanted the game on there site for two weeks for a special event. So...