I don't think it would be feasible to run such a PostgreSQL install during my module install, I will stick to SQLite for the time being, thank you for elaborating on this.
erix, please allow me a well-intentioned reminder: please mark updates to your messages as such, otherwise the thread may get confusing. Better still, post them as a new message (there are always exceptions, e.g. when a definite answer is found, I like to add an update to the root node containing the original question so the answer can be found with ease).