I just posted updates to my Inno Setup CLI Help and Modify Path Inno Setup scripts. The CLI Help is a fairly small update - it just includes updated documentation for the latest version of Inno Setup.
The ModPath update is a bit more substantial; I added the ability to add multiple directories to the system path instead of just a single directory. Usually this capability should not be necessary, but I had a need to do this for the new version of Universal Extractor that's currently in development. If you're currently using an older version of the script, though, be sure to read the updated directions. This new version is not directly compatible with older versions and requires a few small changes to your main installer script.