[lubuntu] Installation stalling

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http://ubuntuforums.org – I'm trying to install lubuntu 12.10 on a Toshiba SatellitePro L450 17K. When I try to get it to install from a USB pen, I get the first screen (with the checklist of RAM, internet connection etc, all detected as fine) and click "continue," and what I get is the mouse arrow changing to the "busy" wheel. I've let this go on for half an hour and it still hasn't moved on to a new screen or given any indication that it's installing anything (no loading bars or filepaths). I've tried installing straight from the unetbootin menu and from the desktop icon on a USB boot. I've als (Hardware)