I managed to uninstall my old version of KBFX but now I need to get rid of all the old files associated with the old version. when i click "move to trash", it says "access denied". I tried logging in as root, but i can't locate the files from there. Help please?

How come you can't locate the files as root? They ought to be in the exact same place as they are when you see them as non-root.
Perhaps they are 'hidden' and you need to set 'view hidden files' in your browser?

the files I'm trying to delete are in /josh/home so they are in my home folder. the home folder in root has nothing in it. when i type in /josh/home in konqeror as root. it tells me that there is no such thing.

as root, can you navigate to /home/josh/ ? They should be there

root has it's own partition if that makes any difference. I have tried a bunch of sda# or hda# but cant get to any other partition but the root partition. could someone show me how to delete the files in a command window? I know it has something to do with rm but the instructions are confusing to me. I typed in rm kbfx and it told me it can't delete a directory.

'man rm' will give you the manual page on the rm function.
A quick basic format is like this:
rm -f kbfx* # forcecfully delete all files named kbfx*
or
rm -frd * # forcefully and recursively delete all files and folders named 'anything'

OK, yes it makes a difference if the root partition is a different one than the one which contains your home folder. If you have the lshw command, that's one way to identify all the partitions on all the devices. Another option would be to use parted.
You will need to mount the partition containing your home folder, and if you still don't get the permissions needed to do what you want to do, then CHROOT yourself into the partition.
So:
mount /dev/hda5 /mnt/somewhere
then:
chroot /mnt/somewhere

That will put you into the root of the mounted partition, where you can work from. after you finish, type 'exit' to un-chroot yourself back to the main partition.