I'll try it again when I get home. I've installed the mod twice, now, actually. The first time it wasn't over a clean install of RTW 1.5 (some old RTR files were still in the folder). It didn't work, but the loading bar would get about halfway before freezing.

This time I installed it over a totally clean install of 1.5, following all the instructions to the letter. It gets to the loading screen but doesn't appear to be loading at all, unlike the first installation which did... to a point.