Get 400k at the start of the game
Complete the first mission - deliver computer parts 

In mission two, collect scientist. When you get back to destination before you 
contact your empoyer sell the shields + guns on the ship you are flying and you 
get around 400k+ credits - you only get to fly the ship for that mission anyway.

Script Editor:
Enable the Script Editor by entering �Thereshallbewings� while flying a ship in 
space.