How to print to UPS's 8.25 x 4 "extended" label?

UPS has a 8.25 x 4 label with a 4x6 peel off label and "extended" 4x2 peel off label. Hoping someone has some advice or sample code for printing the UPS label on the 4x6 portion and then additional information on the 4x2 portion.  I'm using .Net