I have managed to install Software on my PPC (XDA Iii Running Windows Mobile 2003 SE) and managed to turn it into a Universal Remote Control. Even though it sounds pretty nifty there are some disadvantages on it.

For example, the remote isin’t very powerful like other TV / All in One Remotes. The range is around 1.5 Meter, which means I have to sit pretty close to the TV / HiFi etc…
