creating log from installshield exe/msp

msiexec.exe /p "C:\Documents and Settings\qa\Desktop\8.3 Patch.msp" /l*v c:\log85gold.log

if you already have exe then try below one :

"8.3 SP2.exe" /v"/l*v C:\LogFile.log"

How to run installshield MSP as EXE

msiexec.exe /p "full path to the .msp file\PatchPackage.msp" REINSTALL=ALL REINSTALLMODE=omus