I’ve used this pandora battery before, to downgrade to 4.01 m33 cfw. Then, I updated to 5.00m33-2, m33-4, and finally, m33-6. After a while, I used network update, and I thought that DA released 5.50m33. Unfortunately, it’s 5.50 ofw. So, naturally, I ***** out the Pandora battery, and Rains MMS maker. After the first try, it works fine, I am led to the screen.
However, being the smart person I am, I decide to make a back-up of the MMS, on my Mac OS X (I used Rain’s MMS on Windows XP, but I prefer Mac). To test if the backup worked, I formatted my drive, and put the pandora files back in there. It didn’t work. I reverted to Rain’s MMS maker, but now all it does is lead me to the XMB. If I load the Pandora battery (Tool battery, I didn’t mod it myself), it acts regular (meaning, it doesn’t boot to XMB, just stays blank). The second I pop in my “MMS”, hit the “L” button, it simply boots to XMB. What should I do?
Rofl. Apparently, I wasn’t holding “L” before I turned it on. It works perfect now. Waste of 5 points, but I’ll best answer you anyway 
first off, you cant just “backup” a magic mem stick, you have to re- make it each time
second off you should always put the magic mem stick in first, then the pandora battery
hope that helped