Go here http://www.sigames.com/downloads.php...d=383&file=479
and download the Resource Archiver. It'll be a rar file so download it to your desktop and then right click and select extract here. If I remember correctly another rar is created so do the right click extract again with the new rar that appears.
Double click the resource archiver.exe to run the program.
Select extract archive.
Locate the graphics fmf in C:\Program Files\Sports Interactive\Football Manager 2008\data and click it to highlight it. Then click select and it will ask you to choose a location. Remember where you picked so you can find it easily. It takes a while to extract and may appear to freeze but just leave it be.