Adding partitions to a drive that's already partitioned

The attachment below shows a screen shot of my win 7 x64 home premium HP dm4-1160us laptop's hard drive partitions. I would like to divide the C: drive into 2 drives, one for OS and one for data. Is this possible using minitools partition wizard or another partitioning software?? On Gizmo's 3 part instructions on how to partition the drive to allow separation of OS and data, so that a drive image can be made of the OS partition for disaster recovery, he states that if the only hard drive already has been partitioned, "abandon any attempts to further partition the drive". Thanks

 

here is a larger screenshot

 

From the screenshot, it looks as if you could resize Partition C leaving unallocated space between it and the D: Recovery Partition and create a new partition in the unallocated space using MiniTool, AOMEI, GParted or whichever partitioning tool you prefer.

 

Or just back up the important data, like game saves, and "my documents". Format the drive, and install fresh.

I'm not a big fan of partitioning, I'd rather buy an additional drive and use that instead. Partitioning could cause problems, and adds head-aches imho.