Older pc compatibility question

[mdovell at comcast.net]

I have a older pc that looks to have finally started to bite the dust (5 years old). 

It has a 160 gig hard drive..512 of ram processor is a Athlon XP 3200+ / 2.2 GHz 

Well in trying to install ubuntu I get this 
"This kernal requires an x86-64 but only detected an i686..." 

It sounds like I need k7 but I'm just new to this so where can one find it. It looks like its version 6.06LTS 
I see this here http://packages.ubuntu.com/dapper/kernel-image-2.4.27-2-k7 but I'm not sure 
how to make the kernel appear after installation given the hookup that exists. 

Any help would be nice. Thanks 
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