Are you sure this works with Vista 64bit as well?
It should, although I must admit that Vista64 + FS9 + 2GB patch is a combination not many use and we might not have had the chance to test it. Note that in the system requirements for the FS9 version, we don't explicitly list Vista 64 bit as supported so, it might work or not, but we don't advertise it as a 64 bit compatible product. That's why we have Trials...
As explained in the thread dedicated to the >2GB patch, you need to patch a nocd version of the FS9.EXE. If you patch and original (with CD check) FS9.EXE for >2GB, then install any of our products, they will not work, regardless of the OS.
After patching a nocd FS9.EXE for >2GB, you will need to run the installer again, to let it auto-detect which version you have and install the correct version.
Also, be sure you download the installer again, the initial release contained a wrong file that caused FS to quit at start, it has been fixed in the meantime.