Thanks to Diana Fong, I've decided to test print Fedora 7 CD/DVD Label directly onto inkjet printable CD/DVD on my EPSON Stylus Photo R300 from Fedora Core 6.
After some searching, I've learned gimp-print and gimp-print-plugin does not support "Print to CD" option from gimp and I had to install gutenprint and gutenprint-plugin from extras and extras-development repositories.
Now, I can print a nice Fedora 7 CD/DVD label from Fedora Core 6 to my inkjet printer. Here is the result. The first attempt was 360 dpi which produced a poor quality. Soon I've discovered gutenprint can produce up to 2880 dpi. The result was astonishing!