Java SE (Java Platform, Standard Edition)

Does the JRE need to be installed on Windows using j2re-1_4_0-win-i.exe, or is it sufficient to provide a copy of the /jre directory tree?

To ensure a known product configuration, we have been providing a /java subdirectory for our product, then using a shortcut to a batch file that explicitly runs /java/bin/javaw. This has been working fine, but I don't know if this is necessarily valid. The Sun JRE license talks about redistribution and what files are optional, leading me to believe that a directory copy is sufficient. But then I noticed that the SDK has both a /jre/bin/client and a /jre/bin/server directory, while the JRE installation on my workstation only has the /client directory. (And the /jre/lib/i386/jvm.cfg file has a "-hotspot ALIASED_TO -client" line in it.)

I haven't found the answer anywhere else yet on the Sun site or the forums, so thanks in advance for any pointers.