Puzzle Caches In Progress

Here are a few puzzle caches I am working on. These are so hard that there is a website that was started for us to share ideas on how to solve them. Some of these have never been found! If you can help on any of these, please chime in. I can use all the help I can get as I'm not very good with puzzle caches. Here's the list:

Circle of Frustration: http://s37.photobucket.com/albums/e59/daginc13/?action=view&current=f13cof.jpg

Return to Sender: http://s37.photobucket.com/albums/e59/daginc13/?action=view&current=OldLetter-1.jpg

Frodo's Magic Arc: http://s37.photobucket.com/albums/e59/daginc13/?action=view&current=Cachearc.jpg

SpiderFish: http://s37.photobucket.com/albums/e59/daginc13/?action=view&current=Spider_Fish_rev.jpg

Cache Noir: http://s37.photobucket.com/albums/e59/daginc13/?action=view&current=CacheNoir001x.jpg


Link to Cache Owner's Website: http://frodopuzzles.blogspot.com/search?updated-max=2007-11-17T08%3A25%3A00-06%3A00&max-results=6


Okay. Here are the puzzles, any help you can give? The owner's website does give a few hints, but not too many. So let me know what you all think. I think the cache owner is psycho myself!!