If it's a business computer,
what is the need for an mp3 player? Most businesses will/should have a policy against this. You want music, bring in a radio/cd player. The computer is owned by the employer, they are liable for what happens in the workplace. If they let the workers use the company network to share files, who cares if the files are copywritten? That's a secondary issue. The bandwidth costs without a return are enough to put a stop to it. Or so I surmise most business folk would think if they understood the term "bandwidth costs".
The world is only a simple place to the simple.