if your installing linux most install's ask you how you want to partition the HDD and do it for you in which cae i follow these steps
1) Swap: set this partition to be double the size of your ram and set its file system to 'swap'
2) System: this will contain the system (in windows terms the windows folder) i would set it to be 30+ Gb, the default filesystem select should be the right one, its normally ext2. and se the mount point to be '/'
3) Home: this will be where any user data is stored (Their 'Home' folder) set it to be the rest of the HDD, files system ext2 as above and mount point /home.