System Requirements for a VB Project..?

This really comes down to testing on different hardware configurations against a reasonable benchmark for performance. You can come up with some reasonable guesses, but until you test them, they are only guesses. If this is for a cl project, you may be able to list the minimum requirements for the operating system you developed it on (i.e. check the Microsoft site for their minimum hardware specification). Coming up with a recommended configuration could be similar to the box that you developed the project on.