50g

I own the old HP32SII and really the only reason I got the HP50G was because I wanted the same calculator with more memory to store programs.  Well, I got the calculator and after two years plus of sitting in my toolbox, the manuals produced by HP are still not worth the paper their printed on and I have a really nice calculator with virtually no examples on how to use it.  Evidentally as you get a more advanced calculator your suppose to know more math so you know which things to spend a bunch of time figuring out yourself.  When using the old calculator to create programs in RPL, I used the input variable function for variables i.e. I'm used to having the calculator ask me to input all the variables right away and then recalling them when I want to use them in the program.  How can I do this on the HP50G?