Thanks for the quick reply.
I saw the file type info in the Audio CD guide, but i was hoping to not have to install FLAC for maybe the third time, i wanted to point to a pre-existing, already installed version. I don't suppose there's any plan to adopt the point approach that many other programs use? I guess ImgBurn is more multimedia and not just audio, hence the ffdshow approach (?).
Good to see it sounds like cuesheets are handled properly, some burning software does not re-insert the gap, it either ignores it or appends it to the previous track.