The craft.dat file has not merely your current craft in the hangar, but lists the aircraft in the air as well (including UFOs). The "cleanest" craft.dat file (the least possibility of it corrupting a game), is to have two Fighters and one Skyranger in your hangars, with no UFOs in the air. Save the game and take that craft.dat file.
The craft.dat file not only records the aircraft in the air and in storage, but also what is loaded into the aircraft. Load a Skyranger with 80 items and you can "transfer" the items by copying that craft.dat file into the save game that you want.
80 Mindprobes will net you about 2.4 million dollars through their sale. This is also a good way to get extra clips or blaster/stun bombs if you are running short.
Keppin mind that UFOs always show up in the game, so try not to do this trick often, or you will corrupt your game when a UFO (or one of your own) aircraft is in the air when you do this file swap.