My advice with manual in hand just read the disc. and block edit features as they are explained fully and literally play with your unit in your home or backyard and all will fall into place. I remember the first time I ever saw an XLT I was lost but now can change programs at will but it will take some time so don't wait till your in the field familarize yourself at home and be ready for the field. Basically run your unit thru programs, basic adjustments and in pro options stop when you come to block edit. hit the enter center button and a square will go around number, hit enter again until you go into reject and using the down arrow run in down to -95 then using the up arrow run unit up to -34 and next to -35 where you will hit enter again to change to accept and simply run it up to #95, now go to the far left and hit menu and this disc. will be locked in. In a few weeks am sure you will be able to program at will but reading the manual and practice is a must and just do one facet at a time..