hi guys.. i'm new to this whole blogging stuff and I want to use b2evolution for my project!

my question is how do I create custom fields? Its not possible with the standardversion but are there any plugins/extensions out there that allow to create custom fields?

I found a WP theme and want to use it in b2evo, but the problem is that every post requires a thumbnail when posted.. in wp this would be a custom field :/