How to partition the hard disk of Dell Inspiron 1525?

I have bought a new Dell inspiron 1525 (Windows Vista). It have C drive of 136 GB and 10 Gb Recovery partition and 2.5GB Dell Media Direct drive. Now i want to partition the C drive .

I tried using Disk Managment%26gt;shrink volume%26gt;new simple volume and then format the freed space by shrinking but it is saying that you connot create new partition because it have already the maximum number of allowed partition.

Tell me how can i do it?How to partition the hard disk of Dell Inspiron 1525?if u wanna do the partition u need to have a fresh copy of the win xp and then go for the installation, at the process of the installation u

need to do the partition, this is the best option but before doing this u need to have backup all the data which u have on the disk.How to partition the hard disk of Dell Inspiron 1525?you can create a maximum of 4 drives per disk. you must have 4 drives already. what you can do is to extend the 2.5gb media direct drive to include the unused partition, so you can use it. don't touch the recovery partition pls.