Mandrake is an excellent distro to use. Many of the programs you would want to replace your windows will come stock, such as...
-The Gimp - a photoshop type program -- GREAT
-OpenOffice - comes stock
-Firefox - can get and install easily
-cdrecord or K3B - for burning. Work great, very easy. cdrecord is text based command line (easy as heck to use) and K3B aaplies a GUI to cdrecord
-Limewire - may replace your Shareaza program, may not. But, there is most certainly many programs you can use that will be comparable to Shareaza
- Same for eMule - dont know what replaces it, but positive something can.
I am not familiar with ANY of the dvd utilities, but I know some come stock and others will be EASY to get.
I say GO FOR IT!!!! You'll find the things you need much more quickly when you've got linux installed and can determine what is and isnlt included. Mandrake has a wonderful utility called urpmi that will search for, download, and install programs just by giving it a portiong of the program name For instance, once you're up and running, you could type something like
and see if it finds a linux version. Also, if somebody here points you to a program you'd like to try, you just urpmi for it and 99 times out of 100 it'll find it, and any dependencies it may have (this is a huge benefit of urpmi) and install it without a hitch.
Do it, join the other side ;-)
This forum will get you through just about any problems you'll encounter.