[amelia] collecting imputed data sets into an Amelia object

Dear Amelia Listers, I am new to R, Zelig and Amelia. I think my question is rather straight forward, but couldn't find an answer on the Amelia list. Please excuse me if I missed something… I am using Amelia to create ten new data sets for my missing data. I need to change the variables in the newly imputed data (I need to create an interaction variable with my variable with missing values). I do this by manipulating in turn each of the imputed data sets after having saved those sets using write.amelia(). Now, how do I again collect those data sets into an object that Amelia/Zelig can work with? Thanks for your time, Matthijs