saderfer: Dear Goreman and Strife
Did you notice during the installation of the game a small cmd window pop up?
If not, try executing it, it's located on the same folder where the game is installed.
The name of the file (it's actually a script) is SpeedBusters.cmd ... if you edit the file, inside should look like this: sdbinst -q SpeedBusters.sdb
IF and only IF that small script removes the copy protection then the only logical explanation to your problem is that your antivirus blocked the execution of the script, leaving you with a game with copy protection.
I wish you luck!
PS: I don't actually know what the script does, I had it open with Notepad++, and the only I could understand in that mess was SpeedBusters.exe and some other stuff.
Thanks for the tip! I'll try this right now, stay in touch.