Run a module

My Situation (Not that any of you care):

I am making this program. It has a lot of Modules in it (.bas), but as time goes on, new things happen, and I want to add new stuff to it, but people won't download it, if i make a new one.

My Question:

Is there any way you can make a module that your program can use in the future? Like if I had a program, and the module is with it, can I make a new module and the program runs it, from the outside of that program? (i know this is confusing to some of you, but if you don't understand... please ask)

Thank you.

Your best would be to make an update program.

But instead of using MSInet, search http://www.planet-source-code.com for Winsock to download files.