Adds compatibility for Kriechbaum's Mega Sound Pack.

Must have the Sound Pack installed.  

Engines included:

PACCAR MX13 Series from 405hp to 500hp
Cummins ISX12 370hp and 425hp
Cummins X15 Efficiency Series 400hp to 500hp
Cummins X15 Performance Series 485hp to 605hp
CAT C15 Series from 435hp to 625hp available as an option (cost and level availability increased to reflect aftermarket).
Detroit Diesel Series 60 515hp available as an option (cost and level availability increased to reflect aftermarket).

Place above the main truck and sound pack mods in mod manager.