http://forum.mtu.com/search.php? and type in
multisession n the keyword field on the left to search for this topic.
There's several threads listed.
As I recall, some members reported good results by ejecting the cd as soon as the copy program went into the last, or extra track. I don't have any Multisession cdg's so can't swear by it, but it has been reported as successful.
Hope this helps,
George