You will experience less issues with mods if you install them in an organized way :
–
create an ‘oblivion-download’ folder on your desktop. Download the
archives files in that folder (rar, zip, 7z files etc). It is always
useful to have a copy of the original file you downloaded in case you
need to reinstall a mod later.
– create an ‘install’ folder in your ‘Oblivion/Data folder’.
– open the archive file with winrar and extract all files to that install folder
–
open the install folder and read the instructions from the mod. There
are always differences with how mods are installed. It comes down to
this – copy all .esp, .esm files and folders such as Textures, Meshes,
Music etc… to your Oblivion / Data folder.
– it is also
helpful to create a ‘readme’ folder in ‘Oblivion/data’ where you will
copy the instructions (readme files) from your mods.
– once you have copied the files from the install folder, you can delete the original copy from the install folder.
–
read the sticky threads in the forum for more details about installing
mods, especially about mod interactions/ conflicts and Archive
Invalidation methods.
– also, at the very least, download OBMM (Oblivion Mod Manager) so you can reorganize the loard order of your mods more easily