138719 registration of program

I have a small desktop program that was done by another programmer. I want to create a free registration for this program based on a program in php residing on my server. When a person downloads the program, he will be asked to input his email and he will receive by email his password. The password will be related to a random number generated by the program during his installing (may be related to last letter of the name of the hard disk or similar). In other words I want a finite number of password. I ask you to realise both (the registration phase on the desktop application and the php program for my server - If you need I have already a working exemple of this kind of registration). If the work will be good I have also other projects for you. The source code for the program is at [login to view URL]