Marc,
Check this forum and you'll find links to download the software. You can also find it on ebay. I got a copy on ebay but it was an earlier version, subsequently downloaded the latest.
Software is pretty easy to use. I set mine up yesterday. You can see from above that I had a few glitches getting the software to run on my equipment, but once that was handled, it worked well. My Beo5 now controls my system and is set up very nicely. I'm sure I'll be tweaking it as time goes by, but it does more now that I was ever able to do with my beo4's (to be fair, I just never set up my beo4 properly).
I've created custom buttons, added lots of new zone buttons and equipment buttons that I created in Corel.
Very happy so far. The software also updated my Beo5 software from version 1.3 to 1.41
Hans