Orca wont load off of ubuntu feisty live! cd

[Sunfire]

Hi... 
 
I wanted to take a look at orca to see what it was like. The only linux
version I guess I can use without messing up windows is ubuntu. I downloaded
feisty,
burnt it to a cd and started my computer with it. After about 1.5 minutes
the cd stops. I read that you should press f5 and then 3 and then hit enter
twice
and orca should load. I tried that and for some reason it hangs up somewhere
and I can't tell where. I tried this tons of times without any luck. Any
ideas
how to get it to work? would the fact that I used a 32bit cd on a 64bit
computer matter? I also tried wubi but when I try to load ubuntu from it the
computer restarts (it didnt work or something). Anyways, any help would
be appreciated...thanks 
 
Oh, I forgot to mention, I have a EMachines t6212 (AMD64 1.99GHZ/512MB ram
and 160GB hd/xp home)...  
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