  Millimeter (CO) observations of 5 double-nucleus ultraluminous infrared
galaxy (ULIG) mergers are presented. With nuclear separations of 3-5 kpc, these
galaxies are in the ``intermediate'' stages of the merger process. A
preliminary comparison of the distribution of molecular gas (the likely fuel
source for both starbursts and active galactic nuclei: AGN) shows a tendency
for molecular gas to be associated with the AGN nucleus of ULIGs with ``warm'',
Seyfert-like infrared colors ($f_{25 microns}/f_{60 microns} >~ 0.20) and
associated with both stellar nuclei of ULIGs with ``cool'' infrared colors
(f_{25 microns} /f_{60 microns} < 0.2). Studies of ULIGs with a wide range of
nuclear separations using the high resolution and increased sensitivity of ALMA
will provide a larger statistical sample with which the gas distribution,
molecular gas masses, and densities can be determined as a function of the
evolutionary stage, starburst and AGN activity, and lookback time.
