I spent alot of time looking at an angle for running clients on work computers, if you use the stats, proxy and client logs they are great root troubleshooting tools. I found the RC5 client to be very tried and true with only 1 problem out of 57 PC's. I had a problem running Easy CD Creator on a box with the client running. Luckily there is an option to have the client pause when a certian program runs!🙂
I agree with the other posts, be carefull what you run on other peoples PCs. The RC5 client has been around a long time and is well documented.
Good luck with the assimilation!