Not sure if it's clear, but I have done this. The linked file download is for the source models with all the work done, they just need to be renamed according to your naming convention/prefix, and pathed to the textures you guys use.

Here's a list of the default CA names and the updated ones:

\ca\misc\Kontejner.p3d = smd_dumpster_trash
\ca\misc\Kontejner_papir.p3d = smd_dumpster_paper
\ca\misc\Kontejner_plasty.p3d = smd_dumpster_plastic
\ca\misc\Kontejner_sklo.p3d = smd_dumpster_glass
\ca\misc\popelnice_2.p3d = smd_trashcan
\ca\buildings\misc\pumpa.p3d = smd_water_pump

Hello NooneUknow,
yes, it was fairly clear.
Sadly, we cannot simply accept something like this, but I have noted your suggested mechanic and will see what can be done.
Thank you for your impressive dedication!
Andy