Robert
I've only had a few minutes to play around with VirtMus, but I noticed in landscape mode I am getting one page and about 3/4 of the next page. I don't know exactly how that work's yet. I imagine that can be adjusted to get 2 full pages.
Right now I am just experimenting rotating the music 90 degrees.
Also until the annotate function becomes operable I found this free program on cnet.com that will easily erase anything. You can with a writing tool add your own markings but would take a little practice until it was really smooth.
I imagine there are other free image editor's out there that are better than this one, but I just spent a few minutes searching for it.
It will alter the original but not the converted VirtMus image, so you'd have to do your annotations 1st.
http://www.download.com/Free-Image-Editor/3000-2192_4-10623588.html?tag=lst-0-1 Scott