how do you extract extended rom from a rom?

[Cutefox]

Hi guys. i hav successfully flash my dopod 838 with tmobile 2.26 rom. but i realised i dont need the tmobile extended rom. i try restoring my backup onto it after i reset when its customising. i cant get the autosettings of my service provider to work with it. so i reckon i need my old 2.21 dopod extended rom. is there a way to pull it out and combined it with the tmobile 2.26 rom? i try checking into the TEMP directory when its running but all i know is the rom and extended rom is combined.

[Cutefox]

actually i got another question. i found wizard extended rom making kit in the ftp. and i was wondering can i just flash the extended rom itself?

[Cutefox]

EEmmmm i think i know how to upload the extended rom into wizard. but the question is how do i use the extended rom making kit?? i got the files.. but i got no idea how to use it.. no instruction how to this.. anyone help me how to do this and everythin is fine.. thanks guys!! ^^

[Dr Puttingham]

If you're referring to faria's excellent contribution, check out the thread at http://forum.xda-developers.com/viewtopic.php?p=313128#313128

Hope I was of some help ...

[Cutefox]

hey dats it!! thanks guys!! instead of cooking ur own rom i just cook my own ext rom. much easier this way then cooking up the whole thing. my dopod 838 now flashed with combination of Tmobile 2.26 rom plus dopod's customised 2.21 ext rom. its starting up now. hope it works. however my radio rom is listed as 2.25 tmobile. is that good? i look around this forum and got mixed review about which radio rom is better? some says 2.25 cingular some says 2.24 tmobile. so confusing. i am in australia. so would that have any effect? any one suggest me a good radio rom for my combo pls.. thanks!!