Max Passengers 102, not 128-149?

[aMACer2]

Trying to set up my own SIMBRIEF profile but see that this version IXEG B737 Classic for XP12 (B733) has 102 seat capacity, rather than the 128-149.
 

Is there anything I can do to have it allow 129 or more? (different livery, etc.?)

also looking to the basic info to input that is specific to THIS version but have not been very successful.

thx!

Edited February 9 by aMACer2