Hi Kathy,
Error 1603 is quite generic (meaning basically ERROR_INSTALL_FAILURE).
Generally the way to work this out is to generate a logfile of where the 1603 is occurring:
msiexec.exe /i package.msi /l*v install.log
Or via the MSI logging policy, which puts the log in %TEMP%:
http://kb.flexerasoftware.com/selfservice/viewContent.do?externalId=Q110697I would say, just post the entire log here and we can have a look at it. Generally, though, the process is to start at the bottom and work your way up until you see the error.
--Cary