I'm not sure if it was included in any releases, but there is a VST called "jsfx.dll" that allows you to use js fx in other hosts. I haven't actually tried it myself. I think it should be in your \Program Files\Reaper\Plugins folder. If it isn't you can download it from landoleet.org (assuming you know the password) in a file called reaplugs.zip cheers :)