For those still unable to figure IPTV Stalker's MAC by yourself, I came across some MAC codes for Stalker on the internet that worked. I guess you guys are not working hard enough to find them.

One guide even gave out a set of more than a dozen of numbers which you can try  . I tried some of them and they appeared to work.

So quickly , get cracking before they disappear 

Tips :

1) Stalker settings - Enable the Send Serial Number after entering the MAC. Disable and enable the Serial again just in case, before clicking ok.

2) When first opening Stalker, clear the NFPS Cache to get rid of the old MAC.

3) When opening NFPS, if you get the Authorization Failed, don't give up. Try clicking again if the failed message pops up. Sometimes you have to try many times before it opens the list.

Even when the listings appear, opening the channels might again activate the Failed message on and off, but key is to keep clicking until you succeed.

Or if you are feeling adventurous , you can try out the cCloud addon, alternative to stalker, as suggested by Xnet. But cCloud links still not fully functional and don't have the three 'ASS' channels.