you probably won't have to change jetting for those mods. if you got to startinglineproducts.com and look up the product for your sled they usually have downloadable instructions in .pdf form so you can read what they say for your particular application.
from experience i wouldn't bother with the boost bottle. not sure what sled you have though. did nothing good for my 800 other than give me a pair of carb boots with holes in them that i'm now replacing after removing the boost bottle.
also you can modify your airbox yourself to get the same effect as the air horn kit and do it for $0.
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