MAC addresses are flat.
use a program called recordnow it will walk you through it...
Go to ths site for all the info you need on Networking. Copuy and paste into your browser. http://www.windowsnetworking.com/
Salary raises in any field are directly linked to the perceived benefit to the employer. If a programmer is not GOOD for the company, why would the company want to offer incentives for the programmer to stay around? On the other hand if a programmer, or for that matter any employee, is a benefit to the company he or she can expect significant raises through his/her career. Companies do not want to have the good people leave.