InfoPath Dev

Do you know if InfoPath 2007 can be just installed on the SharePoint server to work with Qdabra Electronic Signature or would that have to be additionally installed on each computer for the user to sign the form? I currently have InfoPath installed on just the server and am trying to find out if InfoPath would have to be purchased additionally for ...

 I read this "One Caveat for those of you that want to use this with InfoPath 2007 browser enabled forms: InfoPath 2007 browser forms do not support picture controls (InfoPath 2010 forms do). So, instead of using both the signature picture and the DisplaySignedBy field, you will only be able to use the DisplaySignedBy field. In most ...