This is one of my favorite games. I actually ordered it way back in the day when it came out (my first import game!). Wily Tower is pretty awesome since you get to create a custom loadout using any of the previous bosses powers, Rushes, etc. Competent levels too, and I think it's the only instance of a standard Mega Man boss with two energy bars.
How did you handle the speed issue? Ya know?..How did you get it to run in 60Hz like the Japanese version Rockman Megaworld?
The "PAL" version of the game was not PAL optimized if I remember right. So the European ROM was basically the exact same as the unreleased/sega channel only US version except for the region code that was also used as a lockout.
My brother have the PAL release bought in Spain, I played a lot this game of kid, the music of this version are slower than the japanese,