How to insert a detail record that has more than one master record

I have a somewhat complex situation that I am triying to figure out. I have three tables A, B and C. Table C is a detail table that has a foreign key to table A and table B. There are is nothing else in table C (basically it's used to create a many to many relationship between A and B.
Now I have a application module method that based on some user provided data needs to insert records in tables A and B and link them using table C. I have view links (and associations) between A and C as well as B and C. I can easily go from A and insert (via the view link accessor) a record into C. My problem is that I don't know how to the take that same C row and add it to B as a detail.
I have kinda hacked it by creating a row in B, using postChanges to get it's primary key ID and set the attribute directly in C. It works but I was hoping to find a way to avoid calling postChanges possibly hundreds of times in a loop. I also cannot commit the AM until the process is completed.
I tried setting the "composition association" on both associations but that didn't work either.
Thanks

I'm not sure if this helps, but here's a web page which talks about Image I/O:
http://java.sun.com/products/java-media/jai/iio.html
For your problem, they have a sample solution which can read a specific page of a multi-page tiff file, so perhaps you could make a loop to read all of the pages:
http://java.sun.com/products/java-media/jai/forDevelopers/samples/MultiPageRead.java
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<ns1:uid xmlns:ns1="http://www.oblix.com/">cn=tester,cn=Users,dc=test,dc=org</ns1:uid>
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How to insert a detail record that has more than one master record

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