can someone answer two (hopefully easy) questions for me?

1- is it possible to extend an existing module to create a new one?   I would like to extend the text/html module to include a database-connected dropdown list that will populate an html module according to user selection.    The best tutorial i've found so far (using the DNN starter kit) leaves me with an "announcements" module --close, but not exactly what i need

2- in  VS2005, i get errors indicating that "EditHTML.ascx.vb could not be found", but the solution compiles  and runs anyway.   I've done a file search on my machine to see if i could find this file, but it doesn't exist anywhere.

Any ideas?

thanks!