I thought I covered this in PM? I'll take screenies tonight on how to do it.

Move transport fleet into territory next to land territory.
If you have 3 Divisions you want to load, you must have 3 transport ships.
Select the land units.
Right click directly on the naval fleet. (AKA issues a move order like you would to move to neighboring land province, only you must click directly on the fleet - clicking on the 'ocean' will not work).
Your troops will then take a 'few hours' game time to load onto the ship.
Once loaded, highlight to select your transport fleet.
Right click on the province that borders the ocean that you wish to reinforce.
Transports will move to that province and automatically unload troops.

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