A lot of folks have their RS links as somefile.rm.html (as an example) -- they confuse the web address for RS use with the filename, makes for some tedious hand editing when your download directory has babes.rar.001.html, babes.rar.002.html, and so on
If you use the "Down them All" plugin for Firefox, you can rename using a renaming mask as the download occurs . . . very convenient in some cases