/wps/mycontenthandler/dav/themelist
url that i got from the portal documentation does not work, but the /wps/mycontenthandler/dav/fs-type1/themelist
worksI did two things first i installed a Free WebDav client called BitKinex, then i configure it to connect to
/wps/mycontenthandler/dav/fs-type1/themelist
and /wps/mycontenthandler/dav/fs-type1/skinlist
url on my local server using the URL and port number of local port like this.
Now when i try to connect to themes this is what i get, PageBuilder2 theme along with the static files in it.

Now i can drill down to file, edit the file, ...