Accidentally deleted an Event from iphoto '08

Question

I accidentally deleted an Event from iphoto....By opening the "Show Package Contents" option in Finder I am able to see the Folder (Event in the Iphoto Library) that I accidentally deleted from the iphoto window. I see also all of the photos in that folder. How do I go about reinstating these originals into the Iphoto Library so that I can recreate the Event that I accidentally deleted?
Also I noticed that when you delete or move to trash any photos or events of photos from Iphoto they do NOT appear IN the Trash and one cannot reinstate them from the Trash unless you are one step away and can "Undo move to trash". Please let me know what happens to the photos or events when one moves them to the trash or "deletes" them.
Any help will be greatly appreciated.
Thank you.

Answer 1

That's what I like....succinct, clear, and perfectly accurate. THANK YOU.
If I could ask you a follow up.... On my previous laptop and previous version of iphoto, I and my family had over the years created quite a mess with my iphoto folders, with some photos not even in folders and sitting outside of the typical iphoto folders. My new iphoto functions just fine but I suspect some of the random photos and files which appear outside of the typical iphotos structure within my new iphoto package may not be showing up in my iphoto library (I have not yet gone thru and tried to check). so my questions are:
1. What is the iphoto 08 Package Contents SUPPOSED to look like?(what are the specific folders that one should not touch)
2. If there are other folders or files outside of this structure that may not be showing up in iphoto library, what would I do to import these back into the library? (I do not care if the data attached is missing but would like to make sure I have ALL of my past photos, including ones that I may have misfiled previously).
3.After I do the above, how do I clean up the Package Contents to make sure I leave along ONLY the files that Iphoto depends on.
Thank you.