I have 32 bit Win 7 but lets pretend it is the same.(I just installed it on my wife's 64 bit laptop, we are good)

Step 1) print a config report so you know it's IP address.

Step 2) download this driver  

http://www.support.xerox.com/support/phaser-7760/file-download/enus.html?operatingSystem=win7&fileLanguage=en&contentId=107104&from=downloads&viewArchived=false

As you run the installer, it will ask you local or networked, oddly it is local

It will ask you if it is a new or existing port try existing and look for the IP Address you got from Config

If not try new and use a Standard TCP/IP Port and enter the IP address

Once you get to a list of Printers, push the Have Disk Button and then the Browse button.  For me this put me in the correct directory but it is named very obviously C:\xerox\p7760_PS_64_Driver

Choose the only visible file and click OK and you will get a list of 3 printers, the GX is on that list.  Then just agree to everything until you are done. Once done In Configuration in Printer properties you can configure your options.

I tried to remain child-like, all I acheived was childish.

I pointed you to the 32 bit driver, here is the 64 Bit driver

http://www.support.xerox.com/support/phaser-7760/file-download/enus.html?operatingSystem=win7x64&fileLanguage=en&contentId=107116&from=downloads&viewArchived=false

I tried to remain child-like, all I acheived was childish.