vim scripts

Place an script file in the directory where plugins are placed in the file system. Then it will automatically recognize & use the plugin.
Place the helpdoc in the directory where helpdocs are placed and run the command ":helptags .../doc" in which "..." stands for the path where your helpdocs are placed. Thus ":help ..." works.
project:Project management plugin.
taglist:Structural browsing of source codes.
cvsmenu:CVS integration