Newbie simple installation problem with Mint
 

I'm a newbie to linux - had a play around with Ubuntu before but i've settles for Mint as my final choice for my new laptop.

Hardware configuration is 1 disk split into two partitions C and D (both more or less 100GB) - C is already full with windows and my games and D is empty.

I get to the partition section where i see this, and i'm not sure what to do - i want to install it on the D drive (which is SDA3 ntfs at the moment) but i don't know which options to select. I want linux to be able to take 10-20 gb of the disk but leave the rest accessible in windows if i need it.

Screenshot:

i13.photobucket.com/albums/a259/everyonedoesit/mint.jpg

What do i make the "Use as", and do i make the size what i want for linux? or would that resize the whole partition to 10gb. Confuzzled. Thanks guys :-)

(P.S that 15gb of unusable space is what i removed from vista in Disk Management like i read on a guide to do first, but that didn't work. If i can get it installed there, even better. If not i can reallocate to windows)

Well first off, you're going to have to make a new partition for linux, so take it out of the 'D' windows partition, leaving enough for whatever windows wants. Otherwise you're going to lose this in Windows.

You want to use it as '/'

What happens if you click the unusable partition and click edit? What does it do?

I can't edit it, the options are grayed out.