It doesn't matter if you have .NET 4 installed since each framework version supports the previous versions.
If you encounter any issue, specially those with error dialogs, send me the output to 0x90@cheathappens.com
In most cases i don't have the issues on my test systems (Windows 8 and Windows 7) you guys have. So i don't know about them. But I'm glad to solve them out as soon as you let me know.
When i try to install the Microsoft .NET Framework 3.5 I get nothing?? So must i first unstall the Microsoft .NET Framework 4 Client Profile and then install the Microsoft .NET Framework 3.5 to make the trainer work??