Is it possible to merge two forums, from two backups?
 

I have a copy of the forum dated Feburary 2010 and also a copy for April 2010

The feburary is a working/complete forum, the april copy is identical in terms of data, with the exception of a strange attachment issue (attachments are duplicated)

I'd like to import the april backup into the Feburary one, using impex, is that possible?