This topic is NOT to be offensive. I am just telling you what really happens during the downgrade process.
What MPH made was NOT a 'true' downgrader. When you run MPH's buffer overflow program, all it does it change PSP's firmware number from 2.00 into 1.00. It does NOT change the firmware base itself. It just changes the version number of the firmware. This is similar to WAB's firmware changer for 1.50, only MPH's firmware changer works for 2.00 via the buffer overflow exploit.
After you run MPH's firmware changer, the PSP Update v1.50 will "THINK" it is running PSP 1.00 firmware, therefore it can successfully run the 1.50 update. Since the 1.50 update is officially signed code software by Sony, it can still run on 2.00 Firmware. The only reason the 1.50 Update does NOT run from teh start is because it already finds a later version of the firmware, which would be 2.00. MPH's firmware changer fixes this problem so that you can use the 1.50 update.
So, it wouldn't really be MPH's fault if you brick your PSP. It would be Sony's fault if you bricked your PSP in the process of running the 1.50 Update. The only way it would be MPH's fault is if you bricked your PSP after using the firmware changer, and BEFORE using the 1.50 update.
Well anyway, thanks to MPH's firmware changer, we can FINALLY use Sony's 1.50 update to downgrade our 2.00 to 1.50, via buffer overflow exploit, firmware changer, & Sony's 1.50 update!
Thanks guys. We really appreciate it!
I'd like to thank MPH for the hard work he put into his buffer overflow exploit!
You have officially saved PSP's homebrew community!