You're really either being a bit too impatient, or in the wrong community. There are only a few modders for ZH here, and most of which have tiny animation experience. You'll probably be better off finding the creators of the Shockwave mod and Contra mod, as they have incredible experience with the ZH engine.

As M7 said, this community lacks Generals modders. The amount of 'real' Generals modders can be counter on 2 hands. I'm one of them.
As to answer your question: it depends what kind of animation. Building animation or infantry animation (skeleton-related)?

Pff, animations with skeletons is one of the few stuff I have never tried with GenZH. Sorry mate, can't help you on that one

Animating on vehicles is rather simple, but for infantry i wouldn't know, i'm still going to try it one day...

But to give you some basic knowledge:
-for animating in gmax/3ds(not sure about 3dsmax) first enter animation mode(there a button named animate somewhere, usually bottom right)
-Generals zh can only handle one animation sequence in a file.
-animations for zh work with timestamps and positions, each timestamp has the knowledge of what the location/angle/size of the part is at that moment. ching this in the next timestamp makes the animation.

I know it probably sounds crap, but it might help get you started.

two propellers fit fine in one animation, what i meant with one animation per file is that you can't have jumping and a running anim together(unless you want to animate a run jumping unit), cause that would look like run jump run jump etc etc.

this missing gun only needs to be animated if you want it to move when the unit is running, if not leave it.(ranger has a stationary gun as well, so it just depends on your wishes.)

yes, by making your plane in two parts, one part with just one wing and it's propeller, the other with the rest of the plane. You'll need a bone in the bigger part to link the other part, see the technical for code)

hmm, only thing i don't know is the tilt backwards. the rest is defenately possible, th Shockwave mod has done it.

I think the easiest way would be by making a loose animated propeller model, then code it to be used twice and mouted to the engines. The have the rest of the vehicle in a single animation for the engines turning forward, and use the locomotor to make the entire heli tilt.

In code something like (Note: check with generals syntax, as I don't have any example code around me)

Object Heli
w3d modeldraw module_01
extrapublicbone bone_01
extrapublicbone bone_02
defaultconditionstate ;stationary
model heli.w3d
;no anim
transitionstate a
End
condition moving
model heli.w3d
anim heli.heli
animmode start frame last
animspeed 0.0 ;gets it to stay on that animframe
transitionstate b
End
transition a b ;not sure of correct syntax
anim heli.heil
animmode once
End
transition b a ;not sure of correct syntax
anim heli.heil
animmode once backwards
End
// damaged states.... go here
End
w3d modeldraw moduletag_02 ;the first propellor
attach to bone in anothermodule bone_01
defaultconditionstate
model prop.w3d
anim prop.prop
End
End
w3d modeldraw moduletag_03 ;the first propellor
attach to bone in anothermodule bone_02
defaultconditionstate
model prop.w3d
anim prop.prop
End
End

hmm, only thing i don't know is the tilt backwards. the rest is defenately possible, th Shockwave mod has done it.

I think the easiest way would be by making a loose animated propeller model, then code it to be used twice and mouted to the engines. The have the rest of the vehicle in a single animation for the engines turning forward, and use the locomotor to make the entire heli tilt.

This might help. (but don't take my word for it)

Then on your aircraft add a bone that lines up with the wings/engines pivot point


now everything should be ready for coding, where you just need to attach your rotors to the bone.

I haven't tested this in-game yet, I don't mod Generals much, but maybe I'll test it in the morning.

no, you don't need pickboxes on vehicals, in fact, you dont really need them for infantry, its just there to help when clicking on a unit, it gives small units a larger area to click on.