Another trouble is: SmallPOS is not the management software, it's a framework for making management software. I.e., if only smallpos loaded, then you can't look at how it works.
If you want, I may tinker a small SmallPOS-based example, it's easy and usefull anyway, so do not hesitate to ask :) Something like "Firms and persons", or "books, authors and bookholders" or "teachers, students and courses" - feel free to propose one.
There ARE some real-life examples at the same repo, but trouble is they are tinkered for russian market, so all the labels in russian :)
Greetings,
Yuriy Mironenko