Urgent: PHP interface for a C program input and output

Hi, There is a very old circuit analysis software written in C, called SPICE. It takes a instruction file (plain text) as its input, an generates an output file. I need someone to write a php script which would get the instructions in a form field,or load it from a file uploaded by user, feed it to the spice program, and displays the content of the output file generated, and allowing the user to download the generated output file. The project seems simple and I hope it really is that simple. the winner of this project has to install SPICE on my web server, and run the requested commands using exec() or system(). SPICE download link: [login to view URL] example instruction files included. Due to the apparent simplicity of the project, the winner is the bidder who can start ASAP and finishes it in the shortest possible time.