Note from the author:
I'm working through the leagues according to reputation in the editor and just releasing a 200mb base pack and soon I will be releasing a series of 200mb update packs until I have as many stadia ingame as possible.
These packs will show on the team and matchday screens and come in three different high quality sizes to fit the majority of monitors, 16:9 (1920x1080), 16:10 (1920x1200) and 4:3 (1600x1200). They should also work perfectly on lower resolutions as well, check the key lower down in the post if you haven't a clue about all this screen resolution gash.
Released: 30 Oct 2011 - Picture Count: 225
You will get stadium backgrounds for the following leagues:
French Ligue 1
Italian Serie A
Portuguese Primeira Liga
Spanish Primera División
Russian Premier Division
Ukrainian Premier League + Stal Alchevsk
Turkish Süper Lig
UK & Ireland
English Premier League
Mexican Primera Division
Argentine Primera Division
This background pack works best with a custom skin, for example FM12 Base Skins.
If you find the default transparency of the graphics for the Background Base Skins isn't to your liking you can adjust it by editing the graphics located in the \graphics\bgoverlay\ folder, you just need to alter the transparency of each graphic until you are happy.
If you find the overlay of your skin is too transparent/light, try some darker ones (Opacity set to 80% rather than 50%) you just need to download this file and extract the bgoverlay folder into the \<yourskin>\graphics folder so that it replaces the existing bgoverlay folder and overwrites the old graphics.
Win Vista/Windows 7: C:\Users\<username>\Documents\Sports Interactive\Football Manager 2012\graphics
Win 2000/XP: C:\Documents and Settings\<username>\My Documents\Sports Interactive\Football Manager 2012\graphics
Win 98/ME: C:\My Documents\Sports Interactive\Football Manager 2012\graphics
Mac OS X: /Users/<username>/Documents/Sports Interactive/Football Manager 2012/graphics
If you don't have a folder "graphics", create it yourself.
In order to extract you will need either 7-Zip for Windows or The Unarchiver for Mac.
If you already have the base pack extracted to the exact location above you'll be prompted to overwrite your folders when extracting the next update pack and the update after that and so forth, hit "yes to all" you wont lose anything its just adding the new pack into the file directory to keep everything neat and tidy.
Then open Football Manager 2012, go to Preferences > Display and Sound and untick use skin cache and tick always reload skin on confirm.
Key for finding the right pack (if needed)
16:9 1920x1080, 1600x900, 1366x768, 1280x720.
16:10 1920x1200, 1680x1050, 1440x900,
4:3 1600x1200, 1400x1050, 1280x960, 1152x864, 1024x768
To find out or change your screen resolution right click your desktop, select properties and then settings and you should see a screen resolution slidebar.
Created by geordie1981 on the official SI forums - Original Thread