If you compare the file sizes, the patched version is often 20-30 KB larger due to added security functions.
The original Rapidleech script emerged in the late 2000s. It worked by utilizing your web server as a middleman. You would provide a direct download link (from RapidShare, MegaUpload, MediaFire, etc.), and the script would fetch the file to your server. From there, you could download it to your PC at maximum speed or transfer it to another file host. rapidleech v2 rev 42 patched