ok, the variable you need to change is the PS1 variable (in BASH, which i assume you are using).
in your home directory, there should be a file named ".bashrc" (without quotes), remember it is hidden so make sure you are viewing all files (in X) or 'ls -a' at a prompt. if there is already a PS1=something there, change it. otherwise put the following on a new line
in your file write:
i'm pretty certain on this, but not 100%, as i am booted in windows so i can d/l FC3. is there anyone who can back this up?