Firefox keeps freezing when Googling images. I think it is because it is copying the results into Cache, so how do I stop it dumping search results into Cache ? I don't want all this junk on my PC. If I want to keep something on my PC I would download it.

Question

What extra information ?

Answer 1

Correct, it will only be one-level, the Photos app doesn't support sub-albums - the sub-folders photos will be included in the parent's album.
If you select My Pictures at the top of the Photos tab when syncing, then you should get an album for each folder that is directly under it - so if I understand correctly what you described then that would mean an album for 2013, one for 2012 etc. And each of those should include all the photos in the subfolders under it - so 2013 would include the photos from the events and months subfolders under it.
You can't sync them separately, only the contents of the last sync remains on the iPad, by not including a folder in the next photo sync you are effectively telling iTunes that you no longer want that folder/album on the iPad so it will be removed and be replaced by the contents of the new sync (you can't delete synced photos directly on the iPad, instead they are deleted by not including them in the next sync).
The app that I use, Photo Manager Pro, allows you to select and copy a folder (via FTP), but you would need to select each subfolder individually, which if you have a lot would be time-consuming (I think that if you select '2013' it would ignore the folders beneath it).