Reversioning dependent assemblies

All,
I am using SSIS10 and I have scripts (C#) that call external assemblies.  These assemblies must be strong-named and placed in the GAC.
Is there anyway to rebind the packages to another version of the assemblies without manually going through each script object dropping and readding the reference?  The references are version specific = false.  I have tried changing the reference line in the dtsx, changing the hint path...

Any help or other solutions out there.  As it stands this is laborious and error-prone.