Running both m33 and gend firmwares

Does anyone on here run both firmwares on their PSP.I believe it only takes a few seconds to switch from one to the other.....http://www.geocities.jp/minerva4096/

But you would need to be careful, I knew some risk may have been involved, and the part when you get the bin files from other psp's...well I can see a few noobs bricking their psp's and unable to fix...even with pandora.Use at your own risk in other words.

It says in the guides Ive seen the nand backups etc are not meant to be put on other PSPs.The bairn has 1 PSP and its not connected to anything so there should be no problems.I just thought its a good option to have as it gives you more chance of loading certain types of games