I decided to just start a new, central thread for this, instead of discussing it elsewhere all over the forums.

For those of you just tuning in, I've been helping AlAnonim, the author, with editing and cleaning this thing up. It's HUGE - 398 MB - which makes opening it in the CSE as an active file impossible. In addition, several people have noted problems with trying to build LODs.

Arthmoor asked on the TES4Edit thread why I want to create an independent esp: I want to see if I can copy all the records over to the esp and make a "new" version. I'm fairly

sure that there's a bunch of "extra" data stuffed into this thing somewhere. There are about a dozen worldspaces; I managed to copy the largest to a separate esp, and it's only 11 MB. Even if they were all the same size (which they're not), that's about 130 MB. I don't seriously think there are 168 MB of item/actor records; granted, there is a lot - 665 NPCs, 976 dialogue entries, and 176 quest entries (no, I didn't count them all; I used Egg Translator to look at them - it provides a convenient count).

I'm probably just being crazy; I haven't gotten a lot of sleep this week, so my brain's a little fuzzy.

You can try to make a selective dumps from esm to check what is inside.
Grab TES5Dump and rename it to TES4Dump.
https://code.google.com/p/skyrim-plugin-decoding-project/downloads/list

The biggest records are LAND and PGRD, everything else including npcs and quests are nothing size wise.

You need the author to sit down and go through it in TES4Edit looking at any redundant records or unused worldspaces/interior cells. As you are not the author you cannot know what is intended and what is removable, so you're going to really struggle trying to find content to remove to reduce the file size.

This also isn't something that anyone can really assist with unless they have the file themselves.

zilav: Thanks, I'll check that out.

Vorians: Yeah, I know. The file is available on the Nexus: http://oblivion.nexusmods.com/mods/42121/ and fully playable; he does periodic updates. He's not very tech-savvy, though; he doesn't know how to use TES4Edit, so it's interesting trying to explain things.

Thanks god there is an update file with only esm file available.

Ubanga.esm containes 3 worldspaces each having the size of almost entire Tamriel, so 400MB is a valid file size. I doubt you will ever make it work in CS, master must be split. The best way is the same approach as is Beyond Skyrim project:
1. Put everything that defines asset objects into UbangaAssets.esm: activators, containers, potions, ingredient, statics, etc.
No need for any masters.
2. Make 3 separate esm files for the biggest worldspaces: UbangaFasari.esm, UbangaHalios.esm, UbangaLathia.esm
They will contain only the biggest worldspaces, other smaller/child worldspaces will go into one of those esm files where more appropriate. All 3 masters will depend on UbangaAssets.esm and Oblivion.esm only.
3. The last 5th file Ubanga.esp will host npcs, dialogs, quests, doors that link between worldspaces, packages, just any content that ties all worldspaces together and need to reference them having all previous esms and Oblivion.esm as masters.

The only problem doing so is updating references, possible via script in TES4Edit.
There is also a problem of worldspaces that must be loaded directly after Oblvion.esm, unfortunately I don't know details.