Where do I download Ubuntu 10.04 LTS?

Hi,

I read the following link on set up Linux for L138 LCDK.

 http://processors.wiki.ti.com/index.php/OMAP-L138_LCDK_Linux_SDK_Getting_Started_Guide.

It points to Ubuntu 10.04 LTS and VirtualBox installation. It says that it only supports Ubuntu 10.04 LTS. On Ubuntu website, there is only 12 and 13 release.

I have a Windows XP PC, which also has a linux partition. I would like to know whether is better to install 10.04LTS (if I got it later) directly to the linux partition? 

Thanks,