Use of PST Serial Response box in DirectRT

Has anyon here had any experience with using the PST serial response box located here:[URL]http://www.pstnet.com/products/SRBOX/default.htm[/URL] ? They state that it is to be used with either MEL or E-prime but I figured this may be a little antiquated. If anyone has had success with this response box, any general operation instructions would be greatly appreciated. Additionally, this box comes with a refresh detector system which I am also unsure whether or not this will work or if it is even necessary.

Again, thanks in advance for the help.

Best regards,

Ryan