I was wondering if anyone would extract the races from the underground 2. Since the mod is a total mess, and its nearly impossible to beat the quest, i was gunna play around with the races, but don't want to download the 559 MB mod just for the races, while the addons with it might conflict with some of my mods. Can anyone extract the races and the meshes/textures/other things needed?
Or at least tell me how i can do this? without having to pick through the entire folder, file by file.

The meshes used for the races should be on the body parts tab. The stats will be under the Gameplay->Race menu. If you have Nifscope, you can open up the body part meshes to find out where the textures are. That or just leave all of the meshes and textures where they are, and just point to the meshes in a different mod. This would only be feasible if you're not planning on releasing the new mod.

i dont plan on releasing a new mod. just to mess around on it. thanks.

The easiest way is to load up the esp in the http://planetelderscrolls.gamespy.com/View.php?view=other.detail&id=52 , check all the boxes except for 'body parts' and 'races' then click on delete. click on the body parts category and expand it to list all the contents, check the boxes of everything that is not a body part as there will be something in the file name to indicate what the item is eg , shirt or cloak and delete all clothing items retaining only the skin items , the word skin will probably be in the filename and what is obviously a body part eg ankle , upper arm , lower leg etc.If done correctly you will have an esp file containing only the races and the body parts they need to work.

Use http://straygenius.com/index.php?title=TESFiles on your modified esp and it will extract the files your modified esp needs for the races to work. You will need to have the underground installed as Tesfiles searches through your resource folders for the relevant files your modified esp needs.