EDITING ACCESSRT.MSI - DIRECTORY CORRECT SYNTAX??? URGENT

[leslie746]

Dear All,

I want to install the Access Runtime along with my application (say MyProg) using the directory tree:
Program Files\MyProg\Access_RT where "MyProg" is my application and "Access_RT" contains the Access runtime.

When I try to edit Accessrt.msi using Orca, I seem to be lost in Orca Tables and Directories entries which I am trying to amend.

After I change INSTALLLOCATION to point at the above path,
by using Directory Parent : "ProgramFilesFolder" and DefaultDir: "MyProg\Access_RT" - runtime installation starts with the error pertaining to directory syntax

What in this particular case should be amended and what is the proper syntax for INSTALLLOCATION (DirectoryParent and DefaultDir)?

Also, I would like to be able to skip the dialog box (offering the choice of destination)and instead to go to silent installation into a predefined destination.

I am at complete loss when I see entries like TARGETDIR, SOURCEDIR. Which of them, or any other entries should be amended?

Early assistance would be most appreciated.

Thanks in advance.