Many people talking about, changin the Ver. Number to 1.00 to run the 1.50 Update EBOOT on 2.01 or above.
But this is IMPOSSIBLE.
If you change the Number, you will get a red (not a blue) Error message on start like 'Please contact Sony' and the PSP restarts, like a loop.
That means, we must flash the whole 1.50 Dump.
And that means that a *.swf exploit is not possible, because you cannot run big *.swf files.
Sry for bad english