I'm thinking on adding the ability for it to save settings to an XML file, or even some kind of config file. Then, custom MACs can also be saved there. Edit: I'm starting on getting settings working right now. It took a while, but I'm implementing (slowly) the various settings, their loading, as well as their saving. Edit 2: MAC Cooldown Value also saves properly now as well. I won't add custom MACs yet, but that's planned for the future. Edit 3: Can someone confirm that CPU usage has gone down? I'd really like to know. picano Edit 4: Added a ton of more MACs to the program, so Sequential and Random Non-Prime-Only modes can now cycle through a grand total of 160 MACs.