To create a list of files containing resources of a particular type, use the Find Resources... command in the Find menu. Specify a resource type, and optionally:
A file type to which the search should be restricted such as ‘STAK’ or ‘APPL’.
A specific resource ID or name to which the search should be restricted.
Searching for resources takes some time, so restricting to a single file type or creator will help a lot. On the other hand, restricting by name or ID increases search time.