>That's because I want the mouse to disappear while loading. Bassically what I
>want is a picture while loading, which can not be swapped and without a
>mouse pointer. So this has to be done in AMIGA-mode :( The rest of the game
>is in BLITZ mode

That's all you want to do??  Put:

        poke.w $dff096,%100000

in your code soemwhere to trun the pointer off (a VBlank interrupt is a
nice place), and

        poke.w $dff096,%1000000000100000

to turn back on!