OK, let's try.
First I will assume that you have already downloaded that HP Driver executeable that I linked in my previous post to it's own folder, somewhere on the Windows 7 machine. Now, because it's an executeable you'll need a utility to actually extract the files (the program itself contains an auto extractor, but will just extract to a temp folder somewhere and start the setup process, which we probably don't want to do at this point.) so download and install 7zip
7-Zip make sure you get the version for 64 or 32 bit depending on your install. Once the install is completed go to the folder you downloaded the HP Drivers to. Right click on the file choose 7zip and choose extract here. It's a big file so it may take a minute or two. Now do this
Open Devices and Printers
Select add printer near the top menu bar
Select add local printer
Choose Create a new port and local port from drop down arrow Click Next
In the enter a port name do one of the following
1.
\\MachineNameHostingPrinter\Printer'sShareName or
2.
\\ipaddressOfMachineHostingPrinter\Printer'sShareName
In the install printer driver dialog box do one of the following
1. In the left panel select you printer manufacturer and in the right panel select your printer model (to use Win7 native drivers) or
2. Select the have disk button and direct the install process to the folder where you have download and extracted the Win 7 drivers for your printer.
Let us know how you're doing