The installation guide is pretty explicit in stating 'Here are the Morroblivion mods that you can download if you choose.'
And it's never really stated anywhere if you can install regular Oblivion mods or not. Maybe because its a stupid question with the obvious answer being yes (I hope.)

Mods
I run 119 mods, Major thing is to run .esp Before Morrowind_ob,Morroblivion files if you use OBMM you can Check with Conflict detector to make shore nothing directly conflict With Morrowind_ob.esm,,Or use Tes4edit to check for Conflicts