What are the needed steps to cook my own ExtROM?

[amir77a]

I browse through the forums, in order to learn how to cook my own ExtROM.

What I did was as follows:
1. I user ER2003edit to open ROM v1.72.126 (original iMate ROM)
2. I removed some files and added others.
3. I change config.txt accordingly.
4. save the new ROM.
5. trying to flash the ExtROM

always getting checksum error, and flashing aborts (before its even starts).
in ER2003edit, checksum should calculated automatically.

What am I doing wrong?
Thanks,
Amir.

 

[totallytechie]

Not sure what's causing the problem, as I did the same in the process of upgrading to WM2003SE and it worked ok, but I do have one suggestion.

I've got a bunch of apps which I'm playing with to get my perfect personal combination, which I guess you want to do too. It's probably going to be quicker for you to use one of the standard ms_.nbf files and install the extended rom unlocker.

http://forum.xda-developers.com/viewtopic.php?t=8422&highlight=unlocker

Then you can put apps into and out of the extended ROM, do a hard reset and try it out without having to re-flash every time.

Cheers

Totallytechie

 

[M4io]

you might want to try to recalc

xda2nbftool -c ms_.nbf -u

let me know if it works