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Edit 2: Maybe this is obvious, but once you've followed my guide all you need to do when you want to tether is create a network on your Mac, then go into network settings and change your Location from Automatic to the Location you made during the guide. Then, if the network you create on your Mac is one that you've created before, then all you need to do is connect to that network on your iPhone. The iPhone should remember the settings for that network from the first time you used it assuming you didn't tell it to forget the settings. If you made a new network, changed settings, or told your iPhone to forget its settings then you'll simply need to connect to the network and in settings and under Static enter the IP you have saved in your Location under SOCKS Proxy Server.
The point is, if you do it according to the guide, then the next time you want to connect it should really be a fairly simply matter that goes like this: (1) On your Mac create an ad-hoc network with the same name as the one you initially made during the guide, (2) Go into Network Settings and change the Location to the Location you made during the guide, (3) On your iPhone connect to that network, (4) In HandyLight initiate tethering. (5) Use the internets.