I want to know how to add another distro.

[Uhucream]

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I tried adding new distro,ubuntu. But there are many problems. First,does'nt run startup command such as normal rootfs(wheezy,wheezyx,fedora remix,and so on.). And when I type "startlxde" after typing "export DISPLAY=:0 ~~~",LXDE shows No session for pid xxx.

And I tried changing name of normal rootfs, but after that,startup command wouldn't run. How do I fix these problems?