Maximizing servo range

hii,
i am using HS5245MG and HS5645MG, is there any method to extended the range of that servos?
if i use servo prrogramer (HFP-20 Digital Programmer and Servo Tester or HPP-21 Plus) can i extended my servo range (i still confuse to use that)?

ex: from 120 degree to 180 degree?

thank you

Yes, that is what you need to do.