Progress XCMD took a certain amount of effort to create, get functioning and debugged. For those of you who write monster scripts this external command will go a long way toward helping you create a product that looks very polished.
If Progress XCMD is useful to you and you wish to use it, please feel free to use it. I only ask for a $5 registration to support the development of more XCMDs and XFCNs. Believe me, I have more wonderous external commands up my sleeve, and it is based on the support of other users that these things get done.