Hacking Homebrew PSP DMU file?

[Darkforce]

What's a DMU file? I see:

** Monster_Hunter_Freedom_2_USA_PSP-DMU ** P4E#0157 ** "d-mhf2u.nfo" yEnc (1/1)
collection size: 675.82 MB

Monster.Hunter.Freedom.2.EUR.PSP-NextLevel EUR UMD [00/43] -" nl-mhf2.nzb" yEnc (1/1)
collection size: 1.35 GB

What's the difference?

I'm guessing it's some sort of compression used like cso format?

If it is, then:
1. Is any data cut out or anything missing?
2. Does the game load more slowly at all as with some heavily compressed cso files?
3. As one can do with a cso can I revert a dmu file back to an iso?

Ta,

 

[rhyguy]

dmu is umd backwardsXD

dont know if that means anything though

 

[Azimuth]

DMU is the release group.

the difference here is one is USA and one is EUR, the latter being packed with all the languages im assuming so its larger.

 

[Darkforce]

the difference here is one is USA and one is EUR, the latter being packed with all the languages im assuming so its larger.

Ah, that makes sense, didn't notice they were different regions!

That's a heck of a lot of sound files if that is the case though!

 

[2cb2ct7]

I have noticed that some E region rels are a LOT larger than their U counterparts... Not always the case, but you can nearly always assume it is language based file differences.