ok, after messing around with language overrides in joomla, i manually added a string override and found out where it is located and how it works, for other clueless people who want to translate virtuemart from scratch, here's what you do: (cause instructions unclear - dick stuck in fan etc)
1.) install desired MAIN SITE language in joomla
(a folder gets created in languages folder on your ROOT JOOMLA
(for me it is he-IL), within it you have all the files for different sections of your site)
2.) go to components/com_virtuemart/languages/en-GB
3.) create a copy of en-GB.com_virtuemart.ini and rename it to xx-xx.override.ini
(with xx's being your language file, for me it was he-IL, so he-IL.override.ini)
and put in overrides folder
4.)change strings
the pinned thread was too vague for me, this should be more idiot proof for new people.
[edited for being an idiot myself, i promise i wasn't drunk]