I fully expect getting anything Angular-based in CE/IE6 to be a herculean effort.
Like you said, the Angular team doesn't even (officially) support IE7. I can say, from experience, that you CAN get Angular to work in IE7, but you need to jump through hoops. For instance, IE7 doesn't even have a JSON parser. You need to bring one in.
In addition, anything less than IE9 has major performance issues with Angular-based code. Again, you can work through it, but you really need to make sure the number of bindings (watchers) is to a minimum.
IE6 will be even more difficult to get working and CE hardware is likely so old that Angular would bring it to its knees.
So, to say what I am saying a slightly different way... any app where Angular is very useful is very likely to hobble that enviornment. That is, a full-blown SPA style site. If this isn't the type of site you are building, then Angular probably isn't necessary. I would spare myself the trouble of getting an Angular app working in this antiquated environment and build it a different way.
Also, if you are going with jQuery, make sure to use a 1.x version. They stopped supporting IE6 in version 2.x.