[orca-list] unity trouble

["Glenn" <GlennErvin cableone net>]

Hi All,
I downloaded Ubuntu 11.4 and installed it onto a thumb drive, and I did not 
get the accessibility option when booting, so I had to just have someone 
sighted select boot to live Ubuntu for me.
Then I ran Orca from the alt + F2 window, and logged out and back in, and 
all would be normal, but I cannot access the menus like usual.I did alt + F2 
again and ran terminal, and I don't know if it works, because it knocks out 
Orca.
* Does Ubuntu 11.4 work with Orca?
This Unity desktop thing seems bad.
Is there a command I can run to call up a regular desktop/Gnome session?
Thanks