I guess everything is said in the subject !
I'd try /usr/local/lib/texmf/ini
-- I think that is the default in UnixTeX.
Also you may be able to set the environment variable TEXPOOL
to tell initex where tex.pool resides.
Again, you could try putting it in /usr/local/lib/texmf/ini
or try defining TEXFMTS and/or TEXFORMATS
s-mail: School of Mathematics, Trinity College, Dublin 2, Ireland