Same here. 1.5 ran perfectly. I don't think 1.6 should overheat my video card more.
Shouldn't be a RAM issue, too. I've run several mods without problems, as I pointed out, RS 1.5 was one of them.
I think my issues are not mod-related, though. I've started to get these strange crashes after fighting 2-3 battles on other mods, too. I've recently installed a fresh Windows XP, maybe there's something wrong there. Tried experimenting with drivers and what not. My best guess is a corrupt (or partial) RTW/BI/Alex install, which I did, but it may be sloppy. I'll check it out.