The powerpc-rtems4.10-* tools are now available on AFS under /afs/slac/g/cci/packages/gnu (which is a softlink into a new volume). The versions installed for LAB 1 are linked to /afs/slac/g/cci/packages/gnu_lab1, but are really on /reg/common/package/gnu which is local to LAB 1.
A copy of the development core (2.0+) was built with these tools and booted successfully on rce54.
--Jim