Single User Mode on Guest OS X?

I've got the Mavericks 10.9.3 black screen issue as referenced by several other threads.

I need to access the contents of my VM, how can I start my Guest OS in Single User Mode? Command+S doesn't work.

 

http://kb.parallels.com/en/8724

 

I have this question too, but the link above leads to a restricted or unavailable page.

Could someone just post the instructions on how to do it here please, thx!