Ubuntu Installation :: Entering Username And Password But It Doesn't Work?

I tried installing lubuntu 'over' ubuntu, but am now locked out. Basically, the login screen loads, I've tried entering my username and password, but it doesn't work. I'm not really sure of my username as Ubuntu would automatically fill it in for me. But lubuntu isn't auto-loading my username, so I've been trying to enter all types of variations. I am 100% of my password though

I tried getting help at lubuntu's chat, but that's been kind of hard since there aren't that many people responding. The lubuntu people had me go into recovery mode (2.6.38-8 recovery) and so that would go smoothly. But when the screen of the options of resume, clean, dpkg, failsafex, etc, I cannot move the selector down. So basically, the orange selector is stuck at resume. Whenever I press the down key, the computer runs some lines, and I cannot go back to the list of options. The list is still visible, but can't select any of the options.

If I press the 'end' button, that executes something (probably the last option in the list), and I shut down the pc when it did that. The other arrow keys do nothing. The tab button manages to move the selector from the list to 'Ok' and 'Cancel.' But I cannot move the selector down.. TL;DR: I need to either get into recovery mode, or find a way to get my exact username lubuntu thinks it is.