Sony Ericsson :: W910i- Can Email Be Migrated After Firmware Update?

I have upgraded the firmware in my W910i, and now it doesn't see/recognize the messages (email, SMS, MMS) that have been saved to the M2 memory card, nor does the phone see/recognize the Java applications I'd added. I know all this data is on the card, because I've seen it, via a card-reader, on my notebook.

I have kept a record of all firmware change activity, except I don't know what the original firmware details were, i.e. straight out of the box. I use this SE 'jewel' as a Walkman/iPod, a PDA, and as a serious portable email client, and don't want to lose the ability to migrate my email through any OS upgrade (or phone model upgrade, as I also have a W705a).

I know those 5-6 files (like MSTK_PRO.IND) in the root directory of the memory card have something to do with it, but I don't know how. I have actually seen that the content of the email messages (body.dat files in sub-folders with long numeric names) is simply pure text. I hope there is a way of 're-sewing' the pieces together, using some sort of key formula.