Need Help

I have a fat psp with the firmware 3.73(not custom). I was wondering when the 3.80m33 comes out will it work on the version firmware I have? Also can somebody possibly make a downgrader for version firmware 3.73, that will be well appreciated.Please help me, Thank you.

you are going to need to make a pandoras battery to do that downgrade.. just look for it in the tuts section and you should find it