Hi Dave
I can not give you any legal advice on this (we dont sell or handle music).
Our products are aimed at the home constructor/hoby market, if you want to use our products in a commercial setting I strongly suggest that you read our EULA first, because if you use our products in an illegal way or in a way that requires us to pay any royalties or fees then you will be in breach of your license (see the Videobox EULA).
But I can tell you that you cannot install our software in advance for your friends at the pub, because they must agree to the software end user license agreement themselves during install.
We think the law is realy vague on this, so just be carefull mate.