(Tutorial based on VirtueMart 1.1 Store [Joomla! 1.5] )
-
Log into your VirtueMart administration area.
-
Click on the “Template Manager " in Extensions»Template Manager

- Click your current theme:

- Click on “Edit HTML "

- Scroll to the bottom of the editor panel and paste your Olark code snippet above the tag.
Log in to copy your Olark code snippet.

- Click save.

- Celebrate!