getting rid of android on tablet

[Steven A. DuChene]

I have a few 7" android tablets made by either pandigital or panimage.
They have some older version of android on them. I am not really all that wild about the restrictive and weird nature of android. 

Is there anyway to put a more normal version of some light weight Linux on them? These tablets only have 256MB of real memory although recently I have seen other cheap 7" tablets with 512MB of memory.
I want to be able to run a single graphical app on them with no fancy desktop environment.
I have a graphical app that displays real time data from a automotive ECU and I would like to be able to have the tablet boot up and just run this single app.

Initially if I could just get some sort of text console prompt so I could start to figure stuff out that would be good but I really want to get rid of android and go to some other more normal lightweight linux distro.

Is any of this possible at all?
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Steven DuChene