i have not played race07 in a while now but i will probably give some of the setups a go very soon.
The setups does also works good for the 2007 version of the tracks of course?
You do not need to open the file. After downloading it you just need to copy into c:/Program files/Steam/Steamapps/your account name/Race 07/Userdata/Cars setups/2007 Brno and it will appear in the game.
dont open the file, save the file in your carsetup folder in the right track folder. if the file is save as an [filename].svm.txt rename the file in [filename].svm