HP50G SD card STO and RCL

[Paul 6146]

I am new to this forum but not to HP calculators. I have (2) HP41CX and (2) HP 48SX calculators so I am no stranger to RPN and RPL. I have programmed both of these for a number of years. I just got an HP50G and I can only find one document on the web that deals with the SD card and how to use it. This was a HP support document and most of the instructions it gives don't seem to work on MY Hp50G. I am trying to learn how to save programs to the SD card and then RCL them and save them as a user program. For instance, The document says to use ' when accessing a program on the root of the SD card but this only returns errors on MY HP50G. I have to use " for everything ex: :3:"MYPROG/PROG2.
Also, when you RCL a directory on the SD card, how can you pick out 1 program from the directory (now on the stack) and make it a program on the calculator? What I need is the documentation for **MY** HP50G for accessing the SD card. Can anyone help and point me to it?
My rom version is 2.15, Build 0106, Firmware 4.02

Thanks to all and especially to Dave Hicks for helping me get on here.
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