The CPS hack should be almost identical to the astro changes. do a search in the .exe for the lower freq limit using intell signed you should find it. I currently dont have the time to look (maybe next week I will if you are willing to wait)
he opened the.exe in a hex editor and changed the lower limit from 450 to 440. You will have to do the same exept change the 146 to 144.
I looked up the values for you change 00321B08 to 80A4BF07. Like in other threads feel free to post the addresses changed so others dont have to redo the work.