OTR has archives with the 0x03040506 signature
the original DR2 should use the same archives of Devil May Cry and Resident Evil (Capcom ARC)
then there is the DLC content that is just a chunked compressed file

script updated.
sorry for the multiple posting but have been opened 3 different threads and I don't want that the followers of one of them miss this important fix.

script updated, important bug fixed

well done, indeed there was a bug.
in short I didn't notice that the compressed files were divided in chunks:
http://aluigi.org/papers/bms/deadrising2_otr.bms

the bad news is that it's not possible to reimport the modified files because chunked files are not supported in reinjection mode.

if you refer to how do re-encryption in practive the reimport function of quickbms should do the job. read section 3 of quickbms.txt to know all the details. if you refer to what to do as programmer, the format is really basic so add the align byte (aligned size of the encrypted data - size of origi...

@amzerof6
you are using a jurassik version.

please check if there are updates first and retry:
http://quickbms.aluigi.org

http://aluigi.org/papers/bms/septerra_core.bms

the script reads the list of files from the MFT file and then parses the IDX one for downloading ALL the files from ALL the archives.
so use it one time only.

I have updated the script, it's not perfect but it's more than enough

MJZ0 is used for Mumbo Jumbo archives, I have a complete script for them supporting all the known variants:
http://aluigi.org/papers/bms/mumbojumbo.bms

regarding the IAX files it's not clear if I needed to decompress them or not.

basically they are compressed raw images or similar but their format has the magic signature "iz" (izarc?).
maybe IAX is a graphic format/container like PNG?

oh well, if someone knows something more let me know.

no, it means that you can write the re-encrypter by yourself. the format is very easy but there are only those 2 boring things I have explained before. and I'm not interested in writing a re-encrypt script that must be manually modified by the user for making it compatible with the version of game o...

no because the used algorithm don't support recompression

you can't use the reimport script because it's not an archive, the out file gets generated. it's possible to write a script for doing the opposite job but there are too much compatibility problem with this format, for example some versions use big and others little endian and then some files uses a ...