Or select the "Flexv2" you can tighten, to have more space here '

Hi,

Unfortunately i can't provide you step-by step guidance on this, because this is a custom modification. You would need to purchase premium support through www.flexiblewebdesign.com/premium-support and let us take this modification for you.
But if you have basic knowledge on the CSS; you can do those modifications by yourself though.

Read this topic for more info about how to handle the simple CSS touches easily:
www.flexiblewebdesign.com/forum-virtuemart-2-template-puremart-support/342-using-firebug-for-customization-or-troubleshooting

Reagrds,
Support