I'm on a vista program, not sure wich one, but I'm required to open obmm as an administrater, It wont let me. a message pops up saying "Oblivion mod manager must be installed to oblivion's base directory. If you have moved or renamed 'oblivion_default.ini', please replace it.' whats this mean? and how do i put it in oblivions base directory?

When you installed OBMM it should have been installed in the same directory as Oblivion.exe. It generally does this automatically, but it's possible Vista is messing with you, especially if you don't have administrator privileges.

The best way to do this is to install Oblivion somewhere other than the Program Files directory.

sorry to ask this but..how would i save it anywhere else? it wont let me.

If you use the installer version. OBMM will install itself in the correct place. Otherwise, you need to unzip the OBMM archive in the "Oblivion" folder, the one that contains the "Data" folder.

Edit: What can't you save to a specific location, Oblivion or OBMM?

When you install Oblivion there is a point where you can select the directory you want to install to.

You'll have to pay attention and watch for it, but it is definitely there.

OBMM usually auto-detects the Oblivion install directory when it is being installed.