You could do is make a local mirror of slackware-current
(there should exist win32 utilities for that) then follow these instructions
to make a DVD. They are for Linux but the needed tools (mkisofs and growisofs) are available here
Or, you could put an installer on an USB key
, provided you previously made a mirror of slackware-current as in the first method. There should be a win32 version of the "dd" linux mentioned in the README, Google will find it for you. You will have to tell the installer when using it where is the local mirror.
Out of curiosity though, as I can hardly imagine a case where you could install slackware-current but not slacwkare 13.37, please elaborate a bit which problem exactly prevent you to install slackware 13.37?
EDIT From the other thread you started I see that in fact you have already Slackware 13.37 installed. Why don't you upgrade to -current from there?