Yes there is! Did it last night.
This will work if you tranfer the crew to the same type of boat as you had before.
i.e IXB to IXB.
The first thing to do is load up you new career and load a patrol. Then, before leaving dock just exit and dock at...wherever.
Exit SH3.
Roll back SH3Cmdr.
In the My Documents folder where your career saves are the will be (IIRC) crew cfg files. These basically keep track of your medals & training for your crew.
Find the last one for your old career and copy it your new career.
After you have copied it into your new career rename it to the same as the last one in your new career.
Is that clear?
From memory again so file names won't be exact, but close.
This is something I wanted to ask JScones to include in Cmdr. Crew Transfers:hmm: