I launched comtype_scan2.bat/bms against that sequence of bytes you said in your post and the result is that 72.dmp is correct.
So the algorithm is LZAH (src/compression/de_lzah.c in quickbms)

do you mean something like the following?

1) I guess you refer to a situation like having the archives folder\subfolder1\myarchive.arc and folder\subfolder2\myarchive.arc. Currently quickbms creates an output folder based on the name of the archive, the next week I will check if it's possible to take also the subfolder. 2) quickbms has only...

have you already tried slz.bms?
http://aluigi.org/papers/bms/slz.bms

You need to use the xbox sdk to use that decompression library.

Regarding the format I have not found information about it, I simply wrote a lame script to do the job:
http://aluigi.org/papers/bms/others/minecraft_mcr.bms

I have just released a new version of Signsrch which is very useful to identify encryption algorithms and other interesting things used in games: http://aluigi.org/mytoolz.htm#signsrch In the new 0.2 version there are some important updates: - multithreading, if you have a quadcore now signsrch will...

The xbox version uses xmemcompress (MS LZX) with compressed size plus 0x80000000 followed by the uncompressed size.

script update to version 0.1.1

In QuickBMS 0.5.18 I have implemented a better compression method that uses kzip combined with 2 other tools.
Additionally now I use kzip with the /b128 option that seems to give better results so if you had problems reimporting the XML files now they will work perfectly.

Enjoy :)

ok go with PM

*edit*

you need to use the latest version of QuickBMS:
http://quickbms.aluigi.org

QuickBMS is NOT that GUI program you see in the Tutorials section!
They are two different things and only the version of QuickBMS matters when there are problems with extraction/reimporting.