Also the screenmode I'm using is 720x576. This is a custom (PAL) resolution I have setup which gives the best resolution to play Amiga games on WinUAE. You'll either need to get a program that lets you create and select that resolution (can't remember the name of it now) or just stick with 800x600. Either way that shouldn't make a difference to get Aladdin to work. Try setting immediate blits and switching fast ram to 8MB. Has anyone else managed to get Aladdin to work or is it just me? Incidently I also managed to get Aladdin working on WinUAE 0.8.17!
What is your PC setup andreas. RAM, OS etc.