Software Deployment

Hi all!

I´m trying to silently deploy "CarelinkPro" package.
I saw that it´s an Installscript package so I googled how to deal with that.

First I tried to add ISSETUPDRIVEN=1 to the property table, the thing is that the property was already in the securecustomproperties. But I deleted it from that property and added it as a normal property. Saved the change as a .mst.
There was no OnCheckSilentInstall action in the sequence.

I managed to get to the very end of the installation this way (installing the .msi directly), but it failes in the very end. It is unable to run a customaction named "ConfigureApp". This app uses a .dll file with deffered execution. I think it installes some drivers because I noticed that the step that is missing is a CMD-line which installs some usb-drivers. Perhaps there are other configurations as well, I dont know.

So I instead tried to create a .iss-file but the problem I got here is that everything isn´t recorded. I need to enter a path to a file on a server-share, but this doesn´t get recorded in the .iss. When I install the application using setup.exe -S I get presented with the window where I need to enter the path.
I have looked through the MSI hoping to find the property to set the path so I can pass that through the installer at installtime, but I cant find it.

Help would be appreciated! I have contacted the vendor but they are clueless.