How to Add 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 screen shot

thank you for that info. what if any pro/con for making data partition a logical drive instead of primary? Should I make recovery or hptools partitions logical instead, if so how. thanks again.