I am Interested in learning how to modify a Jasper, in order to try out homebrew and alternative dashboards. I have done some very basic history research on J-TAG, RGH, RGH1.2, RGH2, and R-JTAG. I am concerned with reading up on methods that may be out of date. Example: Does the CR4 XL make an R-JTAG kit pointless for a Jasper? Is Xecuter's R-JTAG starter and Ultimate kit out of date? Is a CR4 XL a replacement approach for these older kits? Why is the CR4 XL described as R-JTAG+ and RGH2+ and JTAG at the url below? Does the + mean something more current than regular R-JTAG or regular RGH2? Why describe it as regular J-TAG? http://www.modchipcentral.com/store/Xecuter-CR4-XL-RGH/JTAG-SLIM-and-PHAT-USA-Canada.html Thanks. Looking for anyone to clear up any history and point me towards any older parts to quest for.