It doesn't require high level of knowledge honestly and you don't even have to do it by text, that's what the UI program is for.It's the only robust free PC EQ I know of that is compatible with my system (20db's or more). Once you install it on a source and know how to do the curves with the UI you save it to a folder and you're done. The only really new thing from basic eq's (besides higher db boost threshold) is the fact that you can change the curve's range (BW/Q).
This is what mine looks like:
You use that as a template with the E12 and SZ2K, save the file or change it any way you like if necessary and you're done. Plus, the only thing you would have to change really is the boosted frequencies you want (45, 50, 60, etc) and the db's if it's too much. This is the only way I know of to reach ~20db's boost or more.