Could do HD? Is this true

yes

and how?

yes some games did HD on xbox. HD is just the rez not the graphical power. all you needed was component cables and an HDtv.

Wait so you are saying. It does not have the power? Wait. Sorry I'm not a nerd.

yup

http://en.wikipedia.org/wiki/Xbox

check the technical specs

If im not mistaken, it's not just a resolution. It's a specific wide-screen resolution.... "HD format" = 1280x720 and 1920x1080 to be exact.

off the top of my head I can tell you that Freedom Fighters was 720p

Actually the whole 720 and 1080 resolutions are a fake resolution standard. The resolutions were created by TV manufacturers because they were to damn lazy and cheap to add the extra horizontal lines that would have brought them to the real HD resolutions of 768p and 1200p. They wanted a wider screen too because people think cinemas have wider screens when in reality they are all full screen resolution movies in theaters but more in the scale of the 4k+ resolutions.

Did the same person that told you the ps2 and Xbox can do hd tell you that the Gamecube can do hd as well?