Place "Tell now" button at the right of the e-mail field instead of underneath it

Hello,

I would like to place the "Tell now" button of the Tell-A-Friend-Block at the right of the e-mail field. In the default setting it places it underneath the e-mail field.

I have found the block in the module code but don't know how the achieve the desired behaviour. Does anybody know how to do that?

Thanks
Roger