Don't know if you found an rpm yet to install Gutenprint 5.0 or not but here is a resource page that says it has one.
http://rpmfind.net/linux/rpm2html/se...ery=gutenprint
When I was using Suse 10.1 I could never get Gutenprint 5.0 installed, I used a rpm from another resource but don't remember which one. I also had other issues with 10.1 and got rid of it. 10.2 on the other hand is working great, no issues yet, and it includes Gutenprint 5.0 so it recognized my Epson CX7800 printer/scanner.