Unpack-pack firmware, possible?

Is there any possibility, to unpack, a little change and then pack back SE firmware?

The main you can't, cause when you modify it, it changes it's checksum and doens't flash;
as for the fs, there is no need cause you can add files or modify stuff files after flasing, with far, xs++ or other ..

Fane_veve
Isn't it useful to add games, flash menus, sounds, drivers, custumization and other stuff to one packed file and just flash it with davinci? No more bruteforcing, no 5$ for finalization, nothing?! So I think you'r not right. I read on one forum that for packing FS we need some closed key, that only SE and some companies like davinci team have. But for unpacking FS we can have only some opened key. So we have SEFSTool

Hmmm, can you tell me please, how can i unpack it, and pack back?
Yes, i know about checksum...

I advise you to read about SEFSTool. This app can unpack FS raw images. To make a raw file you need maintoraw program. Try to find there two programs and you'll unpack FS. Main can be only decompiled, but I don't think it would be useful for you. And as I said in my previous message you can't pack FS because we don't have the hey needed for packing.

Yes, i now know how to unpack fs... thanks...

But can you tell me how to decompile main?

It is impossible to pack it. Only unpack.

So can you tell me how to unpack main?

What reason of unpacking main?

I wanna see the structure of it...
And wanna see if something is maybe editable...

yeah that's a good reason. IF someone can unpack it. But wanna ask. How do the vkp patch like sysgfx patch do? CMIIW when we apply that patch we add some byte to the end of our main firmware, right? why with that we still can flash it to the phone?

i'm with you guys, i am determined to write my own main. i agree that if you can patch a main firmware then you should be able to write one. i mean if the manufacturer ,or whomever does it, can write a firmware that works regardless of what the checksum is when they create it; so can we? i am willing to waste away all my free time with this ... fall into disrepair, etc. etc. so on and so forth :D there has to be someone who knows how 'they' compile the main files, and therefore how to decompile/recompile them. any takers?