Game Save Location Database WWW.GSLDB.COM

DiRT 2

Vista / Windows 7
C:\Users\[user]\Documents\My Games\DiRT2\savegame
C:\Users\[user]\My Documents\My Games\DiRT2\savegame

This was for Steam version. It is probably the same for regular install.

Probably this for Windows XP
C:\Documents and Settings\[user]\My Documents\My Games\DiRT2\savegame

Settings Vista/7
C:\Users\[user]\Documents\My Games\DiRT2\hardwaresettings

Edit File: hardware_settings_config.xml
Has resolution and graphics settings, etc.

Some people have had issues because of Games For Windows Live
If you have issues: Codemasters DiRT 2 support forum