Copied and pasted from an old post of mine:
1. Download the file posted by the person who plays before you in the scenario's turn order. Obviously save it into the same folder as the scenario you are playing.
2. Select options in this order:
- Multiplayer Game
- Network Game
- TCP/IP
- Load a Saved Multiplayer Game
3. On the screen that results, select the .net file that you downloaded.
4. Press enter until you arrive at the window where you select your civ. All information before this is irrelevant to the game.
5. Select your gender and name.
6. Go to Game Options in the Game menu, and make sure "Always Wait at End of Turn" is toggled on.
7. Play your turn however you want.
8. Once you have moved everything you wish to move and have micromanaged your cities as you like, activate a single unit. While it is flashing, hold the Ctrl button and hit N while holding. This closes out all of your unit's movement values. This is very important because if you forget, before the next player begins his turn, the AI will move any of your units that still that still have movement values (i.e. fortified garrisons or planes sleeping in carriers).
8. After hitting Ctrl-N, save the file with your civ and the date.
9. Post the file on the thread along with a report of what you did in the turn, and anything else relevant.
And that's it, pretty foolproof once you get used to it.
BTW you said you read the FAQ, but there's a guide out there too that goes over procedure, pros and cons of PBEM, what constitutes cheating, etc., courtesy of Henrik and FMK:
