I want to partition my hard in half and I was wondering if Kubuntu could install on a partion and if so how.

How big is your harddrive and how is it partitioned right now?

Yes it can assuming that the partition is large enough for what you want to use it for. During the install it will guide you through the partitioning. Get the latest version of Kubuntu and when you get to a part you don't understand start google'ing the info you see on the screen. Oh yea and don't forget to backup your current data

I have a 40 gig hard drive which im going to format and have half windows half linux, so two partitions.

To answer your questions, yes, Kubuntu can be installed to a separate partition. However linux in general typically requires 2 partitions, the OS parition (often called 'root partition' or '/' partition), and a swap partition.

Download the gparted liveCD (it is only 50MB), burn that to CD
http://gparted.sourceforge.net/livecd.php

Boot with that CD and only make the single change: shrink your Windows partition (either FAT32 or NTFS) from 40GB to 20GB. Leave the remaining space "free".
Boot with whatever linux CD you wish to install and just install to the "free unpartitioned space". Most likely you will end up with a 19GB "/" partition and a 1GB swap partition.

Ok thanks, I'll try to remember this.