I am an admin at the IMSLP with the same username. You would probably do best to contact me there. You will need to create an account.
From my IMSLP User Page:
I am an IMSLPgnome; I attempt to make the site as usable as possible through uploading, creation of pages (mainly for publishers, 19% of the pages for which I have authored), page design, cleanup, genre tagging and copyright reviewing.
And I do the featured scores.