Can I import my users before sending the email

I have the plugin and .csv ning file - but while I want to import my users - I don't want to send out any emails just yet. The free ning importer plugin does this - but I was having issues with importing the profile pics - so I purchased a membership here just to get these profile pics in - however it seems like if I start the import it will also send out hundreds of emails...

Maybe there is a php command I can add to the plugin files that will stop the plugin from sending an email just yet. I want to finish setting up the site and ensure that everything is working before inviting hundreds of people to signup... I think this would be an obvious feature in such a plugin.

When I am ready I can clear the database table, restore the plugin php files to their original version and reimport with the emails going out.