If you want to have a reproducable installation you may create a script during install (there is a checkbox in the davanaced tabe, see installer documentation) and reproduce the installation using this script.
For single components like IS it is possible to create clones by copying (and maybe taring) the files, but this must be done directly after installation and requires a thorough knowledge which files needs to be configured in the clone. It’s not all all trivial.
#webMethods#B2B-Integration#Integration-Server-and-ESB