I spoke with support and was told that it's not possible to mass email them out via TNT attachments but wasn't sure if an automation could be run to copy them to an adjacent file.
If not, can anyone share their internal protocol/flow for keeping attachments that may be needed at a later date outside of Select?
The only way to do this with Code Snippets would require a significant amount of Python code in a custom snippet. Additionally, they are not an appropriate way to do this because they were not designed to do this level of code development due to the lack of a full development environment.
The best way to do this is through a custom client/server package that allows full control over the process and allows adjustments to the logic as required (where to put the files, filtering files and orders by profile, etc.). If you would like more information, you should contact our Custom Development Department to at least discuss SoftPro doing the work.