Welcome back!
There's a small bit of documentation over at Cloanto's site about creating a bootable environment
here.
There's also
X-Amiga.
But since WinUAE is by far the best version of UAE, setting up a cut-down Windows box might be the best option. I think it does work under WINE, though, and there was also a thread here a few days ago about compiling the WinUAE sources using some shared WINE files to sort of get a WinUAE binary running directly under Linux. I didn't follow the thread, so I don't know if anyone fully determined how possible it was.
