  The SLD experiment at the Stanford Linear Accelerator Center had a
significant gap in its muon tracking coverage, provided by the Warm Iron
Calorimeter. Supplemental planes of limited streamer tube chambers were added
to improve the coverage in the vicinity of the gap at 0.65 < |cos(theta)|<
0.85. A software effort to upgrade the tracking software for this system is
detailed. The commissioning of the forty-five degree chamber region of the SLAC
SLD Warm Iron Calorimeter is presented. This task involved the completion of
the forty-five degree chamber region geometry for the Warm Iron Calorimeter's
fitter and swimmer and the changing of the way multiple scattering effects are
treated in the fitter algorithm.
