The folder still says it's read only, all folders do, apparently, but the files themself say they're not. Installing a newer version of DOSbox yielded no results, making dosbox an exeption for the virus shield and firewall didn't do anything either. I'm starting to dislike XP over this...
Anyway, thanks for all the tips guys, but I'm taking this straight to the top: the dosbox forum... *insert some kind of really evil smiley here*