Any way to ensure a train has specific cargo?

[sfrazer]

So I'd like to have a station that I can send a train and have it filled with a "new base" loadout. 100 miners, 300 transport belts, 200 power poles, etc. etc.

Is there any way to ensure that only those specific items are placed in the cargo wagon?

Thanks

[impetus maximus]

middle mouse click inside a car will let you filter what can be loaded in each square.
the background will turn a greyish blue.