[Req] Compare tool with Lister and Content olugins support

[Lev]

I would like to have an option to switch both windows to Lister mode with ability to use Lister plugins.
I would like to have additions to Lister API in later realizing compare functions, for example bit difference for bitmaps etc.
Fake Screenshot

I would like to have an option to select and to show Cutom Columns information somewhere at the bottom of compare window, with differnt filds coloured. (Didn't draw on screenshot)

[off]Sorry for two requests in one posts, but I think they are linked. Split'em if needed[/off]