Extracting files from ROM

[jester_b84]

I have an iPAQ hx2790 (JPN) with WM5 and I was wondering if someone can point me in the right direction of extracting files from the ROM area. I did some searching and also looked at the WM5 ROM Tools thread, but I tried all these tools in vain. I tried dumping a ROM image from my ppc (using the tool that auto-dumps ROM into storage card) and extracting that but it didn't work (I believe it locked up). I tried dumping the original .nbf ROM upgrade file provided by HP but that didn't work as well. I just need to extract 3 .dll files so if someone can point me in the right direction, I'd greatly appreciate it!

[mamaich]

You should decrypt NBF file, then the tools would work.
Currently there is no decryption tool available, you should make it yourself.
I don't remember the encryption used in HP NBF format, but it should be simple, maybe XOR with a constant string, and maybe some garbage added after each block.

[jester_b84]

Thanks for your reply mamaich, I didn't know HP's NBF was encrypted. Is there source code for a decryption tool someone made for another NBF format already?