Usually the lists you can download have a bunch of stuff I am not interested in... (Echostar and Bell Ex)
For new stuff like 125W, I just take a satellite in the list that is below my horizon and rename it. (For you, east of 10W or west of 170W) Or I cannibalize satellites list entries that only cover south america.
Then I go into the motor setup and change the orbital location. Then delete the transponders. Then do a blind scan or enter TPs manually.
It's not that much work really.