@ Painkiller
Well if X1 is WindowsMobile 6 Pro, then I'd suggest
PocketUAE. It was reported working (I saw it actually) on WM Pro devices (but have to be Pro, like your SE). Also there's a nice
launcher for PocketUAE. If your mobile is strong in batteries, this is gonna give you much fun :-) But please do report here whether it works on your mobile.
There's one more working emulation -
UAE4ALL - for Symbian s60 devices (feels great!).
There is / used to be some more mobile-UAE emulators, that is
MyUAE or
PalmUAE, possibly more. But those are hard to check out since PalmOS powered devices seem dead or even worse - killed by their own father - Palm Inc.
EDIT* Pocket UAE should work under any Windows Mobile, as long as you have a touch screen. So in Microsoft's terminology, Classic o Professional (WM6) or PocketPC (WM5 and back)