To install a print driver on Win7 x64:
1. Transfer the driver files to the local machine where you want to use them
2. Navigate to Devices and Printers
3. Highlight a printer object from the default view
4. Select Print Server Properties from the tool bar (Only viewable when an object is highlighted)
5. Select the Drivers Tab
6. Click Add
7. Complete the Install a Driver wizard as necessary
The part you are most concerned about is during the print driver selection screen. Click the Have Disk... button and select one of the .inf files from the driver folder. The driver wizard will figure out what it needs and ask you to confirm anything that it cannot.