I found this really useful hack to make Acrobat Reader 6.0 load much
quicker on your PC. Since Acrobat loads a lot of plug-ins that you don't really
need, this helps remove superfluous plug-ins that you don't require for normal
loading, and loads them only on demand.
"Go to your Acrobat\Reader folder and take everything from the "plug_ins"
folder and move it into "Optional" except the following: Search.api,
Search5.api, IA32.api, EWH32.api, EScript.api. Printing and search will
still work, and it will load 75% faster."
This is on Reader 6.0.