OK, by using a combination of all of the above, we got it to work. We had used bits and pieces of lots of these, but this time we went down the list and made sure SY_Activation was 4.5, SO_Options was 4.5 and that we had to missing SO file in the folder. This time, it said nothing to convert and he was able to get into the screen and the DSD mods (which did their own little conversion and it worked, too).
THANKS!