Your MBP i7 fully supports 64-bit using Mac OSX 10.6 Snow Leopard.
I believe this information relates to whether you have Snow Leopard booted up in 64-bit kernel mode. There's currently no benefit to do this if you are still using any application or plugin that might be 32-bit... and in the current (default) mode that Snow Leopard boots up in, you can run Logic and other applications which support it, in 64-bit mode.
Remember you need to be running Logic 9.1.x to benefit from 64-bit goodness... and you must launch Logic in 64-bit mode:
1. Open the Applications Folder and single-click the Logic.app to select it.
2. Command+I to open the Info window.
3. Deselect "Open in 32-bit mode" and launch Logic.