Ok... let me break this down for all of you.
First of all you have a Dish 500 pointed at 110/119. We will not be touching this dish.
1. Go to DishPointer.com, change it to satellite view, search for your address and move the marker to your house. Zoom in as close as you can. Change the satellite to 129 in the drop down. This will give you an idea of where to point the dish in relation to other things in your yard. You can also get the elevation of the dish from this page.
2. Now time to do the fun part. Grab a 7/16's wrench and permanent marker. Go to your 61.5 dish and draw a vertical line on the pole where the dish meets the pole. Start your line on the dish mount and end on the pole. This will help you put the dish back if you can't find 129. Also mark the elevation bolt.
3. Go to your satellite receiver, press Menu 6 1 1 for the Point Dish screen. Change it to 61.5 and Transponder 27 (transponder 27 is also active with HD on 129 at this time). Make sure you have a locked signal (you should as you were watching HD fine before right?).
4. Now you'll either need someone to watch the signal screen or drag a TV out to the dish. Which ever way you choose or come up with is fine, as long as you have access to the signal numbers at the dish.
5. Now loosen the bolts on the dish to move it side to side. Set the elevation at the angle Dishpointer.com told you.
6. Move the dish into the area where Dishpointer showed you.
7. Now slowly move the dish side to side as you watch the signal...slow slight adjustments is key! If you don't find the signal move the elevation a bit and swing it back and forth again. Keep trying each elevation until you find the 129 signal.
8. Now tweak the signal to the highest as possible. The signal will show Wrong Satellite of 129, that is perfectly fine. We will fix that. Just make sure it says 129 and not 110 or 119.
9. Now hit check switch. After the checks, you should now have 110/119/129 on your receiver.
10. Don't forget to tighten all the bolts down.