Hi David...
First let me apologize for contuining to refer to the "Save As" command. This has been renamed "Save a Copy". I didn't intend to confuse things more. Sometimes the command names change but my head doesn't get the memo.
There are several options for working with the template during a rename...
- The config.pro option model_rename_template allows you to set a mapping template for performing a "Save a Copy" operation. This is done in advance of actually issuing the "Save a Copy" command
- You can also specify a mapping template DURING the "Save a Copy" command through the tool that pops up. This is the best way to go. The WF5 version of this tool also features a "Suffix" command to automatically append characters at the end of files during the copy operation. The Save a Copy screen is shown below. You'll need to enter a name for your top level assembly first... but then this window will appear...

- Finally, through Windchill or Pro/INTRALINK you can rename multiple objects at the same time using the "Set Name" function. A small tool will open that allows you to specify a "From" and "To" mapping template. The Rename tool and the icon to access the Set New Name function appear in the image below...

In all cases, you specify a template mapping by setting a From and To value. The From value is typically something like "*.*" The asterisk wildcard matches everything so "*.*" essentially matches everything. The To value would incorporate your suffix. A typical To value might be "*_new.*" This would append "_new" to every file matched by the template.
This gives you enough of the basics. If you're still having trouble, let me know and I'll try to explain in more depth.
Thanks!
-Brian