Towing with my 5spd h3

Ok, I did a search for this thread before I began it and didn't find my answers so I am starting a new thread.  Yes, I know, add to another thread is better but some of my questions don't lend themselves to any of the other 2 or 3 I saw.

I have the 3.7l  5spd h3 with adventure package.  I really need to get a small flatbed to tow such things as lawn equipment, furniture, and some other stuff that just does not fit in the H3.

-Can anyone recommend a trailer for me?
-Can someone tell me why there is such a difference in towing capacity between the manual and auto?
-When I get a towing unit, does it give its towing weight? I assume its regular old weight is its towing weight, but I am not sure if they make some that have towing weights that are less or more than the actual weight of the unit.
-Is there any tolerance on the max tow weight in the owners manual?  I know sometimes a manufacturer will go the way of safety and lower specs a little.
-Am I asking to many questions Dennis?  hehe

Mainly I am looking for as light a weight towing bed, with some side railings, as I can get that is of good quality and that I can use tie down straps to do transports with.  I have already towed a trencher for my irrigation system I installed and it had no trouble at all, but the towing unit and trencher were rented.

Thanks for any advice.

Rob

I would not exceed the max tow weight but I know manufactures will always err on the side of safety and state the max of anything is lower than the actual.  
 
For example..at an old job I was in charge of installing an overhead crane, once installed OSHA requires it to be load tested and certified.  OSHA requires it to be load tested at 110% of the stated max weight, so a 10 ton crane would be load tested at 11 tons.  Some companies will actually load test up to 120%. 
 
I cant help ya with any of your other questions, I dont do much towing.