Here is a general idea of what you need to do:
1. Create a Receive Port and Location to pick up the file via FTP
2. Create a Send Port with a Filer on the Receive Port Name to send the file to a local private MSMQ on the other server
3. Crease a Receive Port and Location on the 2nd Server to pick up the file off the queue
I would use MSMQ rather then MSMQt – basically because it is just easier to work with.
Hope this helps.