Dumbass of the year award...
in the wolves cave I found the bones early one and then discarded them elsewhere in the cave (I know!).
Later on I realize I need them to give them to those ghost dudes, but the bones are gone.

Can I find these again or put them back in the game using an editor or something?

Many thanks,
Simon

Yep. Add that line to the baldur.ini file (under program options, Debug Mode=1). Press ctrl + space, then enter CLUAConsole:CreateItem("MISC6Q").

You can only find them if you remember where you dropped them, but according to my version of Infinity Explorer, the code for "Amuana's Bones" is MISC6Q. Have you made the adjustment to your INI file, so that you can add things using cheat codes?

That was quick... many thanks will try this out!
Fingers crossed! Ha!