other things than *.ase in worlds

I put in another world, but putting in several
characters from off the cobalt directory cost me
file size.

I wonder if I were to use the avatars in cobalt
whether things would be better,
I'd call it subscribing to a relative address pointer
of a known directory structure
rather than the peculiar structure on my hard drive.

http://home.flash.net/~psheldon/croquetWorlds//land1AndAFewScaledMdlsIntoDMU.c3d

Somewhere I recall that, in croquet,
I can get a box around a character and move him
around, couldn't find.

I'd like to place characters in my world that I'm
dreaming of.

Summary :
1. Is there a pointer thing to standard *.mdl or *.*
files to save on size of *.c3d files?
2. How do I move things I add in croquet?