Can you use Oblivion Mod Manager?

eeeh? what do you mean? just copy-pasting your morrowind files to your oblivion directory and then enabeling Morrowind.esm? that is a no :p If you mean converting the morrowind files via the morroblivion-converter-program, then you will have to enable the morrowind_om.esm (and the bloodmoon/tribunal esm's) in your mod manager.

k :) but I'm not sure what you are asking; is it: 1) just using the original morrowind files whitout the converter 2) converting the morrowind files and then use them I typed the words really slow, so you should be able to understand me ;) :p Ask what you don't understand, and just answer 1 or 2 :) :p