How to partition while installing Ubuntu 12.10

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http://askubuntu.com – I have 320 GB hard disk. I want to create like Windows partitions like C drive for OS install. and D,E for store other files. I try this already. but the is partitioned as like USB flash drives. This partitions only stored files. But I tried to create alias for XAMPP projects from this folders. It shown forbidden errors. So how to create partitions? (HowTos)