I have a SIS file with it's own UID etc. Let's name it SIS 1. All in all a valid installable application.
I would like to have another SIS file (SIS 2) whose installation on the phone causes some additional files to be installed in the SIS 1's private folder. SIS 2 does not have an exe, it is supposed to be an "upgrade" of SIS 1, installing additional data files.
Is this possible?
If so how?
If not possible, can there be a folder which is visible only to SIS1 and SIS2?