Thanks for your reply. Hmm, however, I got the version changer to work in 2.0 simply by chosing to let it run despite the warning that it required Kernel mode access. (2.0 doesn't have Kernel access either does it?)

This worked and I currently have firmware 7.5 installed using Devhook .41

This little bit of info was what made me think up the above. I still hope it can work! :-) And hopefully there's someone who can try it.

if Eloader doesn't work via GTA then we're bombed, but I had figured it did work, the GTA part is my blind spot here really, and it's likely where it'll fall on it's arse.

[edit]

Here's what I did with the 2.0 firmware:

Turn on PSP, boot Devhook .41 using firmware 2.0, load "Choice" through the TIFF exploit, then run the SXT version changer and set the flash to 7.5. Choice (Eloader) does throw up a kernel mode warning, however, I pressed X and continued anyway.
The next time I booted Devhook .41 into firmware 2.0, the system information showed firmware 7.5- The PSP remained on firmware 1.5 at all times.

I can play all games I own *except* Outrun in this configuration, so I was looking for a way to turn 2.5 into 7.5 and see if that works.