SQL Alert Tuning SA Fails to Install on MOM Reporting with SQL 2005

I ran into a problem installing the Alert Tuning SA on a MOM Reporting Server running SQL 2005 the other day I thought I'd share. The install simply failed out of the box, with the most generic of errors, offering no clue as to source cause. I noticed in a recent thread on momcommunity where someone identified the problem - the installer uses the ISQL.exe CLI component that no longer ships with SQL 2005, which uses OSQL.exe instead. (For the details of ISQL vs OSQL, go HERE. The fix? Simply make a copy of OSQL.exe and name it ISQL.exe and the Alert Tuning SA will install successfully.