Get USB drivers from Samsung:
http://www.samsung.com/us/support/downloads/t-mobile/SGH-T989ZKBTMB <-- Check to make sure you get the version for your model. KIES installs the USB drivers which is probably why you are unable to see the phone.
On my Win 7 Pro computer, it saw the phone and I didn't need any special drivers.
It usually looks for drivers, but if you put the phone into mass storage mode (should pop up when plugged in) then go to My Computer on your PC, the phone should show up as any flash drive would. If all else fails, you could always use Dropbox. The app is free, and so is the PC software and a basic account (which I think is a couple of Gigs). You can upload photos and files from your phone or PC to Dropbox then download them from there to where you want them. You don't even have to be at home to do it.