Right guys, from what i've read about the whole muzak / CDi / CD-BGM specs, i'm now gonna attempt to write a CDi using some weird old tools from the CDi specification website. the software is on their website to download for free. bit fiddly to use but after about half an hours worth of fiddling it seems to show vague progress. I'll burn a trial cd tonight and take it into work tomorrow to test on the muzak player. If it works or shows anything positive i'll post again tomorrow evening with a step by step guide to how i got the damn thing working.
Fingers crossed

Joll