HP/Compaq :: Win7 Install/deletingpartition

I want to format.. and I like everything to be clean, like, really clean.

Never dealt with HP computers before so I want to be sure..

HP has a separate RECOVERY partition, so I made the 3 recovery discs and a backup of all the Driver folders. (C:/SwSetup)

I figure I could format and delete the additional partition. (make a bigger one later on)

Now that Ive inserted my Win7 DVD and I need to select a partition to install 7 on.. all of the sudden Windows sees 4 partitions in total:

Is it safe to carelessly delete every single one of 'm .. merging them into 1?

And later on creating another one being that I want 2 in total.