Most of the OBSE beta releases are fine. When you find out which textures are missing, you need to install them. What are you confused about? If they existed in your install, they would not be missing... If you are using OBMM, make sure BSA Redirection is selected (Utilities>Archive Invalidation) which should be set by default, I think. Could you confirm that for me?
Edit: Sorry about the double post. I thought I had clicked edit, hmmm....Also, you do not need the list of textures. You are trying to figure out which mod the missing textures are supposed to be installed by, so that you can correct the installation of that mod. Did you already do the MMM renaming thing? What is the name of your MMM BSA? If you used theNiceOne's OMOD installer, that should be taken care of...
Welp I used a combo of BAIN and OBMM, but mostly BAIN. OBMM was just for the body replacers and AWLS. I did notice that the ones I checked out said they had to do with Oblivion.esm (or esp, but I think it was esm). I figured they needed to be reinstalled, I just didn't know how to go about finding out what needed to be reinstalled. But then I remembered that FormID tells you the mods they have to do with.
My MMM bsa is called DLCShiveringIsles - MMM.bsa, as that's what I thought your guide said to name it. I could be confused, though lol MMM was installed via BAIN, so, yeah.
OBMM is set to BSA Redirection, and I clicked Update Now just to make sure.
Also, wow, I just opened Oblivion to check the game out now and suddenly my chara dropped to the ground and it said 'I am over-encumbered'. I looked at my stats and my Health is 1, Magicka 5, Fatigue 4, and all my Attributes are 1 (except Luck which is still 50). O.o