OEB books are read by FBReader. Do you have either
integrated FBReader 0.8.14 with ePub and Registry Support or
FBReader 0.8.4 and
FBReader Registry installer for 2.11 installed?
I explode LIT books to OEB on a Windows PC, then zip all the files together and rename this .oebzip. FBReader recognizes such files as OEB books and automatically opens on the .opf file. However, I don't think the iLiad registry setup includes .oebzip - I use FBReader 0.8.4's built in file and library manager.