Oblivion patching problems

[Sever]

After doing a little mod hunting i found a few promising ones but they require further mods and/or the official patch in order to run. I DLd the official 1.2.0416 patch but was greeted with a "file not found, filename correct but content not matched" or somesuch message before the installation terminated. As it turns out, earlier on today, i installed a mod that replaces the glass armour textures (makes them black, shiny and cool). The readme said to back up the original glass textures because the mod actually writes over them. Thinking i was never gonna miss that ugly green shite, i didn't bother backing it up. (I'm amazed at the irony here: for over a year i didn't patch the game, then just before i do, i go and do something that stuffs it up. If indeed that's what's causing it.)

Anyway, i'm reasonably sure that reinstalling is the only way to get the glass textures back. Since i haven't done this in Oblivion, can i reinstall over all the mods i currently have installed and expect everything to work fine? If i copy my data folder and then paste it back after reinstall will it work? Or do i have to *shudder* start from scratch?