PrintForm...Scale to 1 of 1 Pages?

Im completely new to printing, so please forgive me if this is a noob question...haha...basically I have an image that needs to be automatically scaled up/down when printed...similar to "Scale to Fit" "1 of 1 Pages" in the print dialogue...I need this to be automatically done as its being used on a commercial scale to print job folders, can anyone provide me with the line that does this? Ive searched all over the place in PrinterSettings...I saw PrintRange but not sure how its done.

Any help would be greatly appreciated. :)

Im using the PrintForm PowerPack, Id be willing to switch to another method though