After i reading through all the topics regarding linux, i feel like trying to install 1.. so i have a few question about linux...
I have 2 partition on my HDD, 1 partition i installed vista home premium.. the other 1 i plan to install linux..

1. can i just download the whole linux file n install it? or it need to be burned into a cd n make it bootable??
2. whats the difference among all those distro since they all r base from linux?? y some say is more simple, user friendly... etc?? is it different distro have different add-on?? how about the visual style??
3. after i installed linux, i need to install linux, i need to install another software for visual style?? cos i heard of gnome n KDE but i'm not really sure what it is actually....
4. The motherboard that i'm using now doesn't has the driver for linux.. so how??

thx for your advise... i'm really noob in linux as i haven't used nor do any of my friend is using it... so i can be quite new for me
thx!!