According to [link|http://www.google.com/search?q=cache:v-LZEeiYWJI:www.osxgnu.org/software/Secutity/supatch/+Mac+OSX+single+user+mode+startup&hl=en|this] page from Google's cache.

The link lists a patch, but the original link has changed so you may need to search around for it.

HTH.

Cheers,
Scott.