Finally, I would like to be able to try some other distros. I have two internal hard drives at 160 gb and 80 gb along with an additional 160 gb externak hard drive. The first internal drive has windows XP and the second one has ubuntu. I use the external drive for storage. Would it be safe to try another linux partition along with my dual boot set-up?
It is indeed safe and possible. I have WinXP and four other Linux distros installed on one comupter with two SATA drives. They are all boot from one GRUB config file stored in Fedora Core 4.
I must tell you that Lexmark has the worst Linux support that I know of. I have never been able to get mine to work in any distro, but there are posts on the net and in this forum from people who have been successful. I simply changed printers to HP, which is excellent Linux support.
You can reset your resolution in KDE from the Control Panel>Display>Screen Resolution.
Grub is a terrific bootloader and general Linux tool (IMHO). You will find all the help you need here or on the net for using it.
Hope this helps.