orphan cdr_deltab... tables

We had to "brute force" kill ER tables and rebuild awhile back (per
Informix sup****t).

I see that there are some "orphan" cdr_deltab_xxxx tables left around
that actually "hang" dbschema when it is run on them.

My question is... can these tables be manually deleted without
cra****ng either the engine or ER?

Running version "Informix Dynamic Server 2000 Version 9.21.UC5XF" on
AIX 5.2. Yes, I KNOW, old version of Informix, Vendor is in process of
upgrading to ver 10.

Pete