set up putty, subversion, tortoisesvn. Set tortoise to use pageant to ssh into your svn per usual faqs
Go to registry: HKLM\software\tigris.org\subversion\config\tunnels (or HKCU\ if you prefer) and make a string key
data: $SVN_SSH plink.exe
change PATH by going to my computer->properties->advanced->environment variables and adding the path to your Putty install
make sure you specify svn+ssh://username@configuredhostinputty or it'll default to your windows username, which is probably wrong
use the bastard
Damn that was a pain in the ass to figure out. Seriously, wtf.
Necessary to use Capistrano with svn+ssh though...