windows 7 - Converting C:/ partition to Logical Partition

I have an HP dv6 laptop which came with 4 primary partitions:

1. System Reserved Partition


2. C: (contains OS)


3. Recovery Partition


4. HP_Tools

I think HP is an amateur company which doesn't even know, putting data in OS partition is nuts but they force their customers.

Now I want to create a new partition (primary) for putting my data in it, as of now all the data is in C:/.

Question:

Can I convert C:/ to a logical partition, so that I can create a new Primary partition for putting data in it? If I do so, will Windows 7 boot from system reserved partition?

Here is the snapshot of my harddrive:

I am using Windows 7

Regards