help with virtualbox

[Kristoffer Gustafsson]

Hi.
Since I'm blind, I can't use the graphical interface with virtualbox.
Can you help me to find a tutorial for me about how I do with the vboxmanage 
command?
I know the help for the command in the manual, but I need a step by step 
tutorial.
I need also information about how to set up usb, and how to choose the correct 
sound card emulation.
I know that the choises are ac97 or soundblaster 16.
/Kristoffer