[8525, TyTN, MDA Vario II, JasJam Software Upgradin] trialdei:
i think most of you x01ht users in japan are aware that softbank issued a new rom update that has the new open.softbank.ne.jp password hard-coded as part of the rom image and so there's no way to extract it via extended rom or otherwise (it's not in the preconfig cabs/xmls either). they've also announced that after april 1, the old password which most of in japan are currently using will no longer work so we either upgrade to the new softbank rom or we can't access the open network.

anyway, i've been fiddling with this all night and i think i have a solution that i've tested on a couple of different roms but i'm hoping you guys can give it a try as well so that we can call this a solution to the problem. basically, i made the assumption that the password was somewhere hidden and encrypted in the registry though i had no idea where so basically all i did was do a registry dump with a clean install of the new sb rom, went into connections and deleted the softbank connection, then did another registry dump. finally, i did a compare of the before and after using windiff, figured out what changed and i ended up with the attached two reg files. one adds "SoftBank" as one of the connections (hklm.reg) and the other is the encrypted password (hkcu.reg). you need to import these using the registry plug-in that comes with resco explorer (just dl the trial) as that's what i used and it seemed to work. also, after you do the imports, MAKE SURE you power off (not reset) and then power back on. sometimes the registry settings don't stick if you simply reboot.

to really verify this works, you should first go in and delete your existing SoftBank connection in settings->connections tab->connections->manage existing connections (under internet). if you're not confident then go ahead do a backup beforehand or you can just run the sb extended rom again if you can't get it to work. i've tried this with the sb rom as well as an i-mate rom and it's working perfectly...i'll test it with a couple other tomorrow as well. if this works for you guys, i'll go ahead and make it into a cab file.

update: okay, i've gone ahead and made it into a cab so you don't have to muck around with importing reg files. so just download the cab if you want to run a simple cab install. the zip file contains the reg files if you want to manually import yourself. i've tested both and they work fine. again, i must emphasize that you power off after installing it and not just soft reset. try it out and let me know.

FOR THOSE OF YOU DOING CLEAN INSTALLS:

i didn't realize this but when you do a clean install, you still have to install a couple of the sb extended roms before you run my cab. specifically, you need to run PP_ConnVKK_1.33.761.1.CAB and Provisioning.exe to set up the device to even be able to accept the new password/settings. run PP_ConnVKK_1.33.761.1.CAB first and then Provisioning.exe...now once you run provisioning.exe, you'll find that it automatically creates the old SoftBank connection for you under internet->manage existing connections with the OLD password. go ahead and delete this connection, reboot (optional) and then run my cab (new sb settings.cab). power down and up again and it should work.

just to be sure i did a file compare of the [HKEY_CURRENT_USER\Comm\RasBook\SoftBank] "Entry" and "DevCfg" keys/entries with the old SoftBank setting active and with the new SoftBank settings active and the file compare showed that the contents were completely different. i was worried that maybe somehow the system was just somehow reviving the old password and not actually using the new one but this does not appear to be the case.

UPDATE:

after some more experimenting, it seems that the cab just restores the sb connection with whatever username/pass that you had installed previously. if you delete the the new opensoftbank username connection and then run the cab, it restores the opensoftbank username/password. if you delete the old "open" username connection, it restores that. very strange since the file compare shows that this registry dump (taken from new rom with new settings) is significantly different than a dump taken from a rom with the old settings yet it is somehow restoring the old settings. thanks for looking into this but for now, i think we have to say that this isn't working. so it seems that password is not simply stored in the registry. it must be in some hidden file that this registry dump somehow activates. in any case, i'll keep working over the coming weeks. sorry for getting everyone's hopes up.