Need help changing shells

Hello all:

I am a recent Linux(Red Hat 6.2) convert. I need help changing shells;
I use the "chsh -s --/bin/csh" command. Bash tells me the it is
changing shells, but the tells me I need to use the full path name. I
thought /bin/csh was the full path name. /bin/csh is in the etc/shells
file.

In addition, I am having trouble finding the file/script the determines
the colors displayed in the Gnome terminal emulator (i.e., blue=dir, no
color=file, etc.)

And last but not least, Does any one know where I can get information
regarding the use of Netscape Messenger. I was an Outlook die hard and
need help fast!

Many thanks,

Alex