Well, the siege tank is a bit more complicated than most units, because it consists of 2 units with 4 actors.
* Duplicate Units Siege Tanke (Tanke Mode) and Siege Tank (Siege Mode)
Doing so, also duplicate their Actors and the Siege Ability
* Rename both copied units to your new unit name.
* Edit the Siege abilities of both new units, change Ability Commands -> Morph Info
to your new unit.
Now you have a new tank and a sieged version of it with siegemode but no animation and sound yet.
If you want sound and animation for the siege mode do the following:
* Go to Actors and duplicate "Siege Mode Morph Model" "Tank Mode Morph Model"
"Siege Mode Sound" and "Tank Mode Sound"
* All those 4 actors: go to Actor Event and find all conditions where they reference to the
Siege Tank Units and change them to your new units.
Then you should have a fully working copy of the siegetank
I presume that this mean you set the same actor for sieged and unsieged tank. Go to the siege tank seige mode unit, duplicate actor and then rename actor. After that link the newly created actor with your siege tank.
I've been trying to wrap my head around the data editor for a week now, but i've been making annoyingly slow progress. here's what i'm trying to accomplish, if you want to help with anything besides the tank. a lot has been done, or pseudo-done, on the map.
(it supports diplomacy mode and war mode, a balkans 1912 which is serving as a prototype for a europe 1914. railroads, navy, are some unique parts. you don't build any buildings (except fort and airfield) they are part of the province/city you conquer.)
when you destroy the capitol of a province, all other buildings in that particular province turn your color. all buildings are invincible except for capitol (and airfield/fortification). problem in triggers: i can't find out how to select each building that's within a region, it seems like it should be simple..
Enginer brigade can build fortification (bunker) and airfield (model: Logistics HQ... i'll do stuff with the airfield later, i just want the map playable for now)
fortification is a bunker which does not load guys into it. just has a machine gun weapon.
shipyard can build: SS_Carrier (battleship) Carrier (frigate) Voidray (submarine) and transport (hercules)
the three protoss naval units can only exist in the bottom cliff level (AKA, the sea, aka they are actual navy units); their weapons need to be appropriate for ships exchanging cannonballs
later, i'm going to make the railroads do cool stuff (a railroad artillery battery can move/fire near railroads, fast troop transport unit along railroads also... i'm thinking invisible pylons could help me do this)
or just see what's up with the tank ;) sorry, this editor has been frustrating me for a while, so i'm coming off as feed-me-everything despite my efforts at learning...
while i'm uploading map... i'm also having trouble setting the water and switching textures between tilesets. i got a light grass from BelShir to work, but a mar sara texture wouldn't work, and was totally transparent when placed on the map. maybe i did something wrong with the other texture? i've also had no luck setting the water height and color. which object are you supposed to change, when there are multiple?
Wow! A week, and that's it! Jeez, you really suck at this stuff dude. (Sarcasm)
Don't expect to get everything down right in the beginning. Even if you have prior programming knowledge, this doesn't really help much when it comes to learning the data editor like it does with learning triggers. Give it some more time, and you will realize how vast the data editor really is! (And then you will find the joys of data leaks and limits it gives you... but not for a while)
So the point is that, even if you used the WC3 editor, the data editor will take a couple months to fully understand. Sure you will be able to make this tank pretty soon, but that is only the beginning. The data editor, for a programmer, in my opinion, actually tends to complicate things more than the raw modified C# that they use... Anyways, good luck!
BTW if you want some good tutorials, check out OneTwo's videos on youtube. (OneTwoSC)