Here are a few hints that may get you going quickly:

• When the GUI package manager starts up it shows an hour glass for the better part of a minute (with a DSL line). It's resynchronizing, so be patient.
• The 4 little boxes on the upper left that all look alike are the key to navigation. They actually are subtly different, and if you put the mouse over them they will tell you which icon does what. They control what's displayed in the main window. You probably want the left one, which is not the one the program first starts with. The left one is the one that shows all the packages you can download.
• Select a module with the mouse
• Click the first box on the right, where the mouse-over says "Mark for Install"
• Click the green arrow on the right, where the mouse-over says "Run marked actions"
• Wait for the box at the bottom to say "DONE"

You can also use ppm as a DOS command to install a single package, as in

ppm install YAML-Tiny
[download]

To install the YAML::Tiny package.

The GUI does offer a lot more information about what versions are out there and what versions you already have installed, at the expense of time to resynchronize on loading. However, the interface does take some getting used to, especially since the button icons are so similar to eachother.

I can't see anyplace where the old line-at-a-time DOS interface is still available. Maybe someone else knows that it's still available and where to find it.