I have a Samsung ML-1430 laser printer connected to my Fedora 12 box. I downloaded the appropriate Linux driver tar file from the Samsung website. After extracting the tar file into a directory called image, the following took place:
[Downloads]# ./image/setup.sh

This generates a "Linux Printer Package Setup" pop-up screen.
The following error messages occur after I process the pop-up screen which specifies a default install path [/usr/local/linuxprinter] and asks me to check an "Install CUPS 1.1" box and a "Begin Install" box.

Unable to find file 'cups/redhat/*.i386.rpm'
Stopping cups: [ OK ]
Starting cups: [ OK ]
scheduler is running
CUPS_BackEnd: get-printers failed: client-error-not-found
CUPS_BackEnd: get-jobs failed: client-error-bad-request
Warning: LPP_Init() failed! Waiting 2 seconds...
CUPS_BackEnd: get-printers failed: client-error-not-found
CUPS_BackEnd: get-jobs failed: client-error-bad-request
Warning: LPP_Init() failed! Waiting 2 seconds...
CUPS_BackEnd: get-printers failed: client-error-not-found
CUPS_BackEnd: get-jobs failed: client-error-bad-request
Warning: LPP_Init() failed! Waiting 2 seconds...
[Downloads]#

Any suggestions?

Fedora 12 installs CUPS 1.4 by default, what happens if you don't check the "Install CUPS 1.1" box?

After you installed the print driver from Samsung, were you able to select your printer Model from the Fedora printer setup ?

After you installed Samsung print drivers you will have to do a :

touch /.autorelabel

And restart your computer at the start of the boot process you will see where Selinux does a relabelling of all files, let it do it's thing and it will finish the boot process.

I installed two different Samsung laser printers and had to do the same thing. Selinux would prevent some Samsung Apps from executing.