Only problem with using registry entries, is that if the file is moved to another computer, or accessed by a different logged in user, then the registry values will not be present, or at least not the same. This depends on your forseeable use of the program, and forecasting how your "company" will work in the future. A more robust method would be suggested, as one a company could change it's method of doing business at any time, and no reason to lose out on a well written program by a thoughtful programmer.. I think it looks better to be someone that plans for change and remembered for the good quality of work, rather than someone that has caused great losses by not thinking ahead. Of course helps even more if others understand the problem faced, and see/recognize how you were able to overcome it.

A little social engineering thrown into this vast world of computer programming.