Creating moving prims/moving displays (not rotating, not vehicles, not linked)

I have to build a display that looks like a machine or factory equipment that spits out prims like those icecream machines do at the Ben and Jerry's sim.
I need for the prim to fall to a conveyor from a chute, or at least appear to do so, but be 3D not just a particle texture. I then need for it to travel down the conveyor and fall again into a package.
Once at the package, I would like for it to appear to be assembled into an avatar, stay rezzed for a few moments, and then disappear again.
In my really *wild* dreams, I would like for the end user of said machine to be able to pick various things to go through this machine and see assembled at the end (all prims, not just flat 2d pictures/textures).
I have no ability to script this beyond maybe spitting out a temp on rez prim, and using something like the puppeteer scripts by Todd Borst to get it to look like it's going down the belt, but since those movements have to be triggered by touch, I doubt that's going to work. Surely this isn't has hard as it all seems right? Could someone give me some advice on who to hire, what to pay, or what scripting God to pray to tonite so i can make this thing???
thank you humbly in advance

Isnt that just a case of telling the prims to move a certain distance from and object and then follow a path?

I doubt a physical option here would work - not least because of the innacuracy of gravity effects on physical prims, otherwise what you are asking could be done IMHO.

Its all about sliding doors and mirrors really

Erwin