A painful aspects of Adobe Reader 6 is that it loads too slow. I use my computer to make a living, so it costs me when software is slower than I am.
The Inquirer posted a fix, which can also be found at many other Web sites (just search for "EWH32.api"):
1. Find the plug_ins folder under Acrobat 6
2. Rename it plug_ins_disabled.
3. Create a new folder named plug_ins.
4. Copy the following files from plug_ins_disabled to plug_ins:
EWH32.api (external window handler)
printme.api (print documents)
search.api (search documents)
I did that, and found that Reader now loads in a few seconds, instead of nearly a minute. Another alternative is to uninstall version 6 and reinstall v5. Most PDF documents are generated to be compatible with v4, so there is no burning need to "upgrade" to v6 -- unless you need features specific to v6, like CAD layers.
Other .api files could be copied over for additional features. For example, DCortesi.blog suggests including these to convert Web pages to PDF:
Users are asking Adobe to create a fast-load option for Reader, which would demand-load .api files as needed.