That into the swat2.ini file in the swat2 root directory to get all the missions. Now all can be accessed through quick play.
Cheat
Type in LOS during the middles of the game to see all characters and items. You have to type VERY fast in order to skip the hotkeys.
Sell Infinite Weapons, Gain Infinite Money
In the Recruitment screen, select a unassigned terrorist/officer and go to "Equip". Now, select the same terrorist/officer from the menu, select his small firearm and push "Remove Item". Before you do anything else push UP or DOWN on the directional keys and another small firearm should appear. Remove it as well and another should appear.