You will need to install and configure Samba. There are other programs you may find useful such as Linneighborhood to make life easier. Linneighborhood is not necessary, but provides a windows like Network Neighborhood look and feel. You can connect to Windows shares using Konqueror web browser.
You should find all the software you need on your Mandrake CD's.
Here are a couple of liks to get you started in the right direction.
http://www.dalantech.com/ubbthreads/...b=5&o=&fpart=1
http://us1.samba.org/samba/docs/using_samba/toc.html
The links I posted have a ton on information. Samba is a very complete program, and has many things that can be configured. Take your time, do some reading, and if you have problems, search the forum here, and look through the Wiki section.