Hi Gonk,

Sorry for the late reply but the URC-300 is an excellent remote. It learned every button from 5 other remotes and it is extreamly easy to use. I would highly recommend it.

342 is the right code for a URC MX500, but that code is not in the stock unit. You will have to send the unit back to URC to have them update the codes for the newer devices you have. I just sent my MX500 in to be updated with codes for my Motorola-Moxi DVR (111), Philips PW34850 HDTV (259), and the Outlaw 950 (342). When I get the unit back I will be able to select the code which will provide all of the functions.