Hi Michael,
I can try to help you out here. I am not sure what you are asking:
how can i add a link for the import of pictures?
Could you please explain that more so I can understand.
Related to that other post is all our events are stored in WordPress’s post table same as post and pages. We do not create another table.
And again this plugin may help you with the images:
Easily Edit Featured Images In Bulk With The Quick Featured Images Plugin
If you can expand on your question more I can try to give some pointers on what you would like to do.
Thanks