Software Deployment

I 've a vendor msi (Sungard Prophet 7.3) that generates an error relating to a service (propehtnodeutils) at runtime if the msi is installed silently. I have done the usual comparison of the UI and install sequiences and the relevant custom action that creates this service only runs in the install seq.

If I change the services property (in the workstations services) to log-on using the users particular a/c then the app runs ok. If left at the default setting usig the local system a/c then the runtime error is produced relating to the service. If the app is installed fully (non-silently) the error is not produced at runtime. It seems like the app at runtime runs in the system context and also then uses the user a/c privs? Has anyone else ever come across this?

I know how to create a service using the "serviceinstall" table but can the log-on be specified in the anywhere table ? The setting will also need to be a variable will need to be used due to the user a/c changing depending on who is logged on. Maybe a VB custom action would solve this ?

Any info on possible solutions welcome, many thanks!