If you want to tune your PROMPT you just need to use... the PROMPT command ! By default the prompt is set to the current path, but you can customize it a little.
# Display prompt help
# Customize your prompt
PROMPT $T $D$_$P $F
# Will give this result in my cmd window
17:11:55,31 sam. 21/10/2006
D:\Documents and Settings\Nicolas>