Modify Starting Cash
     You  can edit the dark.cfg file and add the line "cash_bonus n" N
represents the amount of cash added to the beginning of a mission.

Skip to Next Mission
     Press [CTRL] + [ALT] + [SHIFT] + [END] to skip to the next mission.

Increase Cash (Bug Exploitation)
     Just  before  completing  the  mission,  do  a save or quicksave.
Complete the mission and save it in a different save slot. Reload your
last  save  or  quicksave  before completing the mission. Complete the
mission  again.  The  statistics screen should now have ADDED TOGETHER
the loot from BOTH mission completions. Apparently, the variable which
stores  treasure amount at the end of the mission is not being cleared
between loads. You can keep doing this until you have all the cash you
need  to  buy  out  the  store  at  the loadout screen for the mission
immediately following.

No Killing Rule
     This involves editing the USER.cfg file, first make a copy of the
file,  then add the following lines "cheats_active", "nokillgoalcheat"
this  will alow you to win with out worrying about the no killing rule
in some missions.