It is possible to download and install a BB10 Simulator that should run in your Win 7 environment and then you can test directly. That, in my opinion, is the best way to test.
You will need to install a VMware solution and run it as a virtual machine. But I think the documentation explains this process quite well - you will find it all here:
If you do have problems with this, then please give us something more than "it didn't work". If you look at the documentation, you will see that it should work, and it works on my Win 7 system, so I suspect there is a problem with your system or installation rather than the Simulator itself. But "it didn't work" does not give any idea where to start to help you with this.