first create a new icon featuring a separation line of your choice (a nice tool to do that is icon brush...). now copy the icon and paste it to a newly created folder via the show info box. don?t think you are ready, you are not :)
dragging this folder in the dock makes it jump to the right, because only apps can be aliased on the dock's left side. to trick the dock is easy: just name the folder .app at the end. you can still drag the folder only on the right side but on release it pops to the left and you can put it where you want!
unfortunaly each separator has to be a new folder, but that?s not that bad; you can name them like the kind of stuff they separate. now in the dock it gives the name of the following separation via help rollover...
this makes my day for sure :)
[Editor's note: I'm not sure about the separator functionality, but tricking the dock with the '.app' extension is pretty slick!]

