Seeker there are some good tutorials on the IRIS site at the bottom of the home page(well I imagine they would be good if I usderstood much of it).
http://www.astrosurf.org/buil/us/iris/iris.htm If you go through and save each page from the links (or save the PDF file) then when you. When you find them, fi you go to the "Deep Sky Processing" link, the page that opens has downladable images for practicing on.
That's the only tutorials I know of. I hope you're more technically minded than I am.