[dogscoff]

If you're really careful / clever / obsessive, you can use different sized ships to manipulate cargo using queued orders: For exampl, you wanted to drop off 300KT of a 600kt cargo:

Build a small ship (frigate of something) with exactly 300KT of cargo space. Move it to a sector near the planet you want to drop cargo on.

Now give your cargo- carrying transport the following orders:
Move to ship, drop cargo onto ship, move to planet, drop cargo onto planet, move back to ship, load cargo from ship.

The transport will (should) drop just 300KT onto the ship (because that's all it can hold). Then it will drop the remaining 300KT onto the planet, and finally retrieve the ship's cargo - Voila! 300KT on-planet and 300KT on your transport.

I've never tried this, BTW, but I think it should work. Obviously it's a long-winded and expensive way of doing things but it could be useful in simultanous mode. You could also experiment with cargo carrying satellites instead of a ship.

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"Pinky, are you pondering what I'm pondering?"
"I think so, Brain, but if they called them sad meals, kids wouldn't buy them.
"