My first born is turns 16 the 28th of this month (God help us all) and doesn't know a spreadsheet from a word doc but there isn't a game out there he can't put a whooping on. Trade hell, you can have him, in fact I'll post your auctions for you if you'll take him.
Netscape and IE will coexist ok but as you install Netcrap read real careful and watch all the checkboxes. It will try to set it's self up as the default browser. I never used Netcrap very much because every time you click anything it's always steering you to their web site. It may very well be a better browser but I don't like the way they operate. Of course Microsoft doesn't have a good track record either, look at Windows ME (Multitude of Errors).