Planetfall has 4 water terrains. Check out the Planetfall mapscript.
I'll comment it here: I can only see 3, but good to know, thanks

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I've also tried again the mapscripts from Koma, auto-replacing the coast/ocean with a 3. terrain type, "desert ocean", works, i get a full "sand-sea".
I hope, there's a way to get the AI work, i'll play a bit with it next weekend

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Patch E
Includes the patches A - D
Bugfixes:
- Small bug with one message related to terraforming solved
Additional things/changes:
- Korean UU "Plasma-Infantery" renamed to "Laser-Infantery" and changed it to a european UU
- New unit "Terminator" for the civic "Android Society". Modell by seZereth, skin by Avain
- New unit ABC-Infantery, modell by Mechaerik
- New Unit Plasma-Infantery, modell von Mechaerik
- "Exploration-Tank" renamed to "Exploration-Rover", new modell from Keldath
- New modell for the submarine
- New american UU "Goliath"
- 2 new korean UUs "Behemoth" and "Behemoth XT", all modells from the submarine to this come form Empire Earth 2, were uploaded by Deliverator and animated by The_Coyote
- New alien leader added, modell by cfkane
- Finally my own icon, thanks to Avain

- New farming concept: Farms can only be build in the first ring around every city
- Irrigation can be spread with "Mars-Botanics"
- Removed all rivers and lakes from the mapscripts, thanks to Koma13
- Removed all rivers from the pre-made maps
- All units from the "Life 2.0"-civics like "artifical body" or "Terminator" starts with the promotion "not human", so they do not cause military happiness
- Changed one event, activated a second
- New unit "Migrant", which can add +1 population to a city. I need some people, who can tell me their observations, if the AI uses them or not.
The new units: