Resizing volume?

[necrox]

hi,
Firs off all, sorry for bad english
Is there how-to or somethink for volume resize?
what I need:
My mac have 1 volume and there is running mac os x leopard on it.
I wanth create more one volume without deleting operating system.
is there a way to resize my current volume?

 

[simsaladimbamba]

http://macs.about.com/od/applications/ss/diskutilitypart.htm