They don't need anything in them, that "//do nothing - print loading is handled automatically" is a comment, meaning nothing will happen anyways.
As for those errors, I have no idea what's causing them. I've had quite a few downloads and no one seems to have a problem. I don't have any errors using them as well.
the fact is, you get this error massages
exec: invalid script file Add-Ons/Print_2x2r_Monizor/server.cs.
exec: invalid script file Add-Ons/Print_1x2r_BLPRemote/server.cs.
and i did allready tell you, how to fix that
i dont know why the decals need the server.cs file, but fact is they do
both server.cs files are empty, i think the game can't handle with empty files
thats why you get the error massages
check out how the other did it, in all there server.cs is written
//do nothing - print loading is handled automaticallyi have found out, it's enoth to wright this
//and i tell you
fix thatbecouse, it does not make a good impression, when your work spit out errors
but do what you want, i only wanted to help