Hello, I am Perseus, but you don't care anyway down to the nitty gritty

For various reasons I want to install Ubuntu on my Windows computer using VMware

I have a Toshiba Vista *2 bit operating system *.8* GHz * gb ram Intel Core Duo T5550

I get through all the steps except the final one, *according to a guide* and it states that I have a i686 CPU and need a x86-64 bit
I have tried both downloads on the Ubuntu both 64 bit and the other *forget the name*

So, does anyone have any idea's to help me ^.^ Or can refer me to a place that isn't complicated and easy to understand, VMware is about as hard as its going to get for me. Thanks again