Keep in mind that msdb is a system database and contains information related to the source system. Given that, don't restore msdb from another server.

If you know know the path(in SSIS) you can build a script using dtutil.exe to pull them out of the server.

A while back I wrote a utility to import and extract DTS packages from a server.. Its on CodePlex.. I looked at doing the same for SSIS but didn't think there was a great need, I might have been wrong..

CEWII