Good News!!! I just found a map where you start with only a desert eagle and a knife. All original weapons are removed from the start and you get those instead. So there's got to be some way to do it.
The new .fgd has both target_audio and trigger_audio, there hasn't been any replacement.... If you don't have them, then get a new copy. No idea about the CD problems.
It has suddenly started working again-very odd : . Sorry to ask so many questions but ever since I upgraded to Hammer 3.5 the trigger_cdaudio point entity has been replaced by the target_cdaudio,and now suddenly no music I want to play will play . Does anyone know why this is? Thanks for all the help so far everyone!