Finally, I've got a Tutorial for the scallop border and corner punches. I will admit these can be a little frustrating--but when you've got a few little tidbits of info, they are EASY!!
Here we go...
Start with a piece of 4 1/4" square piece of cardstock.
This shows that the top scallop is where the left over un punched area is...the bottom 3 scallops are lined up with the previously punched areas. You only want that top scallop to be the one that is punching the left over areas. Why?
Well, if you shift them up, the bottom scallops can punch into the bottom corner (or vice-versa). When you have more than one scallops' worth of space to punch, line up the top two (and so on) spots to punch the remaining scallops.
So what if you want a rectangle? Use a combination of sizes (for instance 3 3/16"x 2 7/16")
Here is a BEAUTIFUL card that I made based on something my good friend,Kimberly made):