To make your own vehicle you need
A copy mod object of your choice with a number of prims below (31-maximum of riders)
This limit objects to become physics. It's number of prims limit, not land impact
The “guide engine” provided in the GTS extra tools folder
Copy mod animations if you need to add any
The guide engine is made of two prims
The pyramidal root prim that contains tour scripts and must stay the root prim in your final vehicle. It points forward, red is left green is right
A box prim that contains AVsitter scripts notecard and animations
If the object you use has already AVsitter menu you need only the pyramid. Unlink and discard the box
Otherwise you will link complete guide engine to your object. You can save one prim by moving all the AVsitter content of the box to some other child prim.
Move the engine prim to center of object. if needed, make it transparent.
Link order is important to make sure our engine prim will be the root (prim #1) rez your object aligned with the engine. edit object, shift click engine and link.
Physical motion we use can only move objects of max 32 physics resource cost . but each seated avatar counts for a prim. so if you plan 4 seaters final object must be less than 28, engine included. That physics limit is weird. but if your started tour does not become physical it has to many prims
If needed you will add copies of scripts [AV]sitA and [AV]sitB. every seater must have a pair of those scripts.
Manually rezzed vehicle won't start any tour so you can work on it and use AVsitter menu and helper bars to adjust your animations and edit AVpos notecard. AVsitter is NOT my product AVsitter documentation
More infos
You can link an object, an AVsitter equipped furniture and the guide engine (as root) to make a vehicle. But if you do that with more than one furniture you will have to make AV SETs and define sit targets.
AV doc
In every APpos notecard add SET N at beginning. SET 0 SET 1 and so on
edit the prims you want as targets for sitting and set prim description
0-0 for set0 sitter 0
0-1 for set0 sitter 1
1-0 for set1 sitter 0
and so on
this way every AVsitter system will work independently