photosmart 7760 driver on PC running RH 7.1

I want to attach a HP PhotoSmart 7760 Photo Printer to a PC running Red Hat 7.1 Linux. I once connected a Canon Bubble Jet printer to the PC using printtool and was able to print something out on it. The printer driver is postscript (i.e. I have ghostscript installed). Since this printtool is older than the printer, it doesn't know about it. I don't want to upgrade at the moment. I just want to find whatever file or information printtool needs to know about the PhotoSmart 7760 and place it where printtool can find it.

As far as finding the printer driver goes, I've went to www.linuxprinting.org and eventually found a file named

HP-PhotoSmart7760-hpijs.ppd

and downloaded it. I am not sure whether this is the file I actually need. If so, how do I make printtool aware of it?

While looking at the linuxprinting site, I saw pointers to a website for CUPS, which seems to know something about ppd files, but the documentation for CUPS says that installing it will destroy the existing printing system on my computer, which I don't want to do. So, I'm rather confused by all this. -- Ignorantly, * Disclaimer: I am a guest and *not* a member of the MIT CSAIL. My actions and * comments do not reflect in any way on MIT. Also, I am nowhere near Boston.