I guess when I said central PA, I should have said south central PA, about 5 minutes across the river from Harrisburg.
Anyway, I saw a video on youtube and the brewer said he usally goes a few degrees higher than what promash says. So, the program told me to put in 155 degree water. I went up to 157, put it in the mash tun and let it sit for a few minutes. It was at 154 when I put the grain in and I after I stirred, it dropped to 150.9, right in the middle of my target of 150-152. Of course, I could have gotten completely lucky. After a few more tries, I'll see how things go. I'm currently using the demo version of promash and haven't purchased it yet.
I never thought about adding boiling water to raise the temp. If I end up doing a step mash, I'll be sure to use your tip, thanks Denny!