To change the wireframe, you need to edit three files: wirefram.grp, tranwire.grp, grpwire.grp. These are located at the unit\wirefram directory inside the MPQ files. I advise you look for these files in the order of patch_rt.mpq => broodat.mpq => stardat.mpq, so that you get to work with the newest versions of the wireframe images.

Now what are these three files? wirefram.grp contains the large wireframes displayed when you select one unit. tranwire.grp contains unit wireframes used when inside a transport, I guess you won't need this one since you will be working with an air unit. Finally, grpwire.grp contains the small wireframes used when units are selected as part of a group. Each image in these files are used for the unit with the same ID # as the frame number of that image in the GRP file. Thus, all you need to do is to replace the Battlecruiser hero's wireframe images with that of the Valkyrie.

Thanks again! It was actually fairly easy to change the wire frames, once you know where to look! This particular project seems to have worked out just fine. At this point Norad II is now a Valkyrie hero.

On another note, I probably should have used the Hyperion rather than Norad II though. I wasn't thinking about the fact that Mengsk & DuGalle also use the Norad II weapons entries and such. Hyperion actually has its own entries.

Still, its working! Again, thanks for the help/advice.