windows xp partition

I want to reinstall windows xp but system shows only one partition(system has 3 partition).How can I do this.How can I repartition the disk and install windows xp.Please help me.
Answer #1
Download Hirens Boot CD and do all your partitioning in DOS using Acronis or Partition Magic on the CD.
Answer #2
u don’t see when installing or u can’t see when ur in desktop?
Answer #3
Please explain in details step by step.
Answer #4
is that installer saying you have 1 partaion, or is windows saying you have one paration?
Answer #5
windows saying it has one partition (83gb)second partition(0)disk space and third partition(0)disk space.