I was going bananas trying to figure out what cutter to go with and how to come up with a print and cut workflow that would work with my SJ540. I finally went with the graphtec because it had the super easy to use plug-in for illustrator.
Someone also pointed me to some web videos that signwarehouse had dealing with contour cutting with a prismjet extra....
Go into production manager and either add a file to print and double click on it or go into set default properties. Go into the 5th tab over (lables and marks) and look about 2/3 down the page for "print marks".
If you set up a SC 500 as a printer you could still print on the FJ with that setup and then there will be a crop mark area in printer options.
This is from a newer version of flexi but you should find similar in 7.6.