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There's really not many for AMEP 2011, Autodesk called them "Updates" that year.
You need to install Update1 before installing Update2, then depending on language, there's probably only two hotfixes, Trim hotfix and Code Execution hotfix (As always, read the readme files first)
http://knowledge.autodesk.com/support/autocad-mep/downloads#?sort=score&s=2011&page=1