I am trying to do my second install of 10.10 Ubuntu onto an old desktop. I have gotten as far as the final partitioning. What i'm doing is making an extended with a Swap and ext4 in it. i want the ext4 mounted to /. I have my laptop set up the same way (see attached image). so far on the desktop i have the extended and swap set up, but i still need to make the ext4. but when i try to make it, i don't see the option to mount it. how do i do this? (I'm using Gparted btw) also, once i have set it up, i need to install it. do i just click on install side-by-side with another OS, or custom install? in the past i've done custom install and set up the partitions there, but idk if it's different or what this time because im setting them up before hand.