Inventor not only includes some improvements to Shrinkwrap for 2011, but it also provides a means for batch creation of Shrinkwrap models. This can be done in the Inventor Task Scheduler which can be found buried in the Inventor program group here:
Once in the Task Scheduler pick the Shrinkwrap option from the “Create Task” list.
Add the files you want to make Shrinkwrap variations for, and edit the Shrinkwrap options with the button at the bottom.
After the task is complete, a log file is available that shows if any of the assemblies ran into problems with the Shrinkwrap operation.