start with either PFD fabric (prepared for dyeing) or fabric that has been prewashed to remove any sizing/oils from the fibers. i use freezer paper cut to the same size as my printer paper. (best to cut it a little big then trim it to size after ironing it to the back of the fabric) press the freezer paper to the back of the fabric (make sure your edges are very secure you may want to actually tape them) then you can run these fabric/freezer paper pieces through your printer. i don't know the printer you are using but it needs to be an inkjet printer...not a laser printer.
after printing your pictures let them 'cure' for at least 24 hours then heat set them. i keep 'curing-heatsetting' my pictures for a week (i don't know if it's necessary but i do it for the insurance) then remove the freezer paper from one of your pictures and go run cold water through it to see if it runs or is 'set'. there is a product on the market that helps too...called retayne.