7-Day Software Demo-NEED ASAP

I have a software program written in C#. It is very well written and commented. I need a 7 day, fully functional version of this software as soon as possible. I just need this software to display a message after 7 days that says the demo version has expired and give a link to my site to purchase the full version. I also want to ensure that someone can't keep installing the software after the demo has expired. This software uses an access database and I also need the categories and subcategories [login to view URL] will NOT effect the operation of the database in the software program. I just want a blank database on install. I have $30 to my name and need someone who can help me out! I need to generate sales quickly! I will give the source code to the programmer who can do this project for me today. PLEASE HELP!