Embedding a model inside another model

Hi All,

I was just wondering how you would go about embedding the ASRS Model from the downloads section of this website found at this link:
http://www.flexsim.com/community/for...?do=file&id=52

into the Highway Traffic model also from the downloads and found at this link:
http://www.flexsim.com/community/for...?do=file&id=74

I such a way that later on you could have trucks coming out of the ASRS Model's facility and using the highways from the Highway Traffic Model etc.

Thanks in advance.