A couple of thoughts on the subject:
What version of Nero did you try to install? It must be at least 126.96.36.199 to function in WinXP.
There's no way that the XP operating system could "see" the other version of Nero on the ME partition.
<font color=red>My Rig:</font color=red> <A HREF="http://www.anandtech.com/mysystemrig.html?rigid=6847" target="_new">http://www.anandtech.com/mysystemrig.html?rigid=6847</A>
<font color=purple>"Have you noticed how much they look like orchids? Lovely! ... Robert A. Heinlein"</font color=purple>