Adul,
If you're running Mandrake, it's a piece of cake. Open the "Home" icon, and browse over to the folder where you downloaded the tar ball. Right click it, and select "archiver". Then from the menu, select file/extract to. Pick the directory you want it to be in, check the box that says "preserve permissions", and click OK. You're done.
Now, open up a terminal, change directories to where it has been extracted. If logged in as root, type ./dnetc and hit enter. If not as root, it would just be dnetc and enter. From there, it's just like setting it up in Windows.
Russ, NCNE