BuffSkin skins your buffs, simple!
Updated to 2.2:
Small GUI change, updated .toc
Updated to 2.2:
Included a few more textures
Added options to select the gloss texture you want, and change its alpha and size.
Updated to 2.0:
Buffskin is now split into 2 separate addons: the teeny tiny bit which replaces the blizzard borders on buffs, and the configuration file which allows you to change the textures of these borders, and change the positioning of the border.
As the configuration file is now load on demand, if you don't open up the configuration, it'll never load! Making the addon even smaller. You can even delete the configuration addon entirely and buffskin will still happily skin your buffs like mad!
To add your own borders, simply create (or borrow) any .tga file you like, making sure that it is square, and dimensions that are a power of 2 (32, 64, etc)
Add the image into the BuffSkin/textures folder, and give it a name that hasnt already been used, for example "texture3.tga"
To change the configuration, type "/bs" or go to interface->Addons,
select the type of buff you wish to modify (buff/debuff/wepench), and drag the slider or select a different texture.
Note: This addon does not and will not ever resize or reposition the buffs.