I read this interesting and very simple tip on how to convert your linux bash prompt to look like a dos prompt.

Here is the link to the original article.
http://www.linuxhaxor.net/2008/07/18/make-your-bash-prompt-look-like-dos-prompt/

Quote from the article:

Add this line to your .bashrc: PS1=’C:${PWD////}>’
This basically changes the format of your prompt, to look like a dos prompt.