The 500 was programmed to go bad the minute the 500x came out, which was programed to go bad when the Firefox came out (is the the right name?), which broke as soon as the Helix came out. Luckily, I hacked the CMOS and turned the date back to 2003, which was when the 500 was still in concept mode, which tricked the 500 into being better than it was when it came out to the general public.
Beyond that...
The 500, 500X, HD Pro, and HD ProX are all the same unit. So, if you are looking for patches, you can use patches designed for any of them.
And there is a converter locked to the top of the forum that will convert files for other devices.
Before you get to far into anything, I would suggest you get the system settings correct. Otherwise, you'll be fighting a battle you can't win.