I'm currently using firmware 6.35 PRO (TN Hen) on a PSP3001 (ofw 6.35) and trying to get RJL v19 to work. Whenever I try to install Plugin Driver B, it says that DPisnt.exe for 64-bit ins't installed. I've installed this dpinst.exe from another source, but get the same result. I've also tried disabling the driver signature enforcement through cmd.exe and manually signing the .sys files, but neither works. The F8 trick at the beginning of start-up for advanced boot options doesn't work either. I'm using a Win7 64-bit system on a HP HDX 16t laptop. Any tips?