How can I fit a door in a frame that is too small?
Ok Kenny, here is the plan.  You can remove one Jack stud and door header with a sawzall(cutting between the studs to cut the nails) and some work. You can then replace the jack stud with a 3/4" board cut to 3 1/2" width and the new 3/4" higher height.  Put a 3/4" block on top of the remaining jack stud and reinstall the header 2X4. It will still fit between the outside studs and be supported 3/4" higher then before.  Obviously, you will have to trim some drywall away to do this, but that can be pieced in and patched fairly easily and if you're careful cutting it before the demo begins. The drywall seam may be covered by the door trim.  The result will be a finished opening 3/4 inches wider and taller than you started with. Your new door should slide right in!  Good Luck.