FYI, there's a project to down-convert some of the XWA Upgrade OPTs to XvT/BoP format. There's a link to a RAR file on
this page (it's in Spanish, so you may try a Babelfish translation), and there's a thread
here that you can read to keep up to speed on the project (must be a registered member of the XWA Upgrade Project forums to view).