***edit***
Think i figured it out, now i can open dvd tray, put in original dvd, press a thumbnail picture of xboxdash in xbmp. And the dvd starts, after the film, i open the tray, and return to xbmp. I guess its not the worst solution.
*******************
ok, more problems .
After messing too much with my xbmp as dash, nothing would boot.
Luckily i had evox boot dosk, so i could fix it.
now im instead asking for advice before i push my luck further.
I want to play dvd with the remote, the manual said you could make a shortcut to the ms dash, i guess you would need autorun for the dvd to work.
i made a "msdash.cut"
<shortcut>
<path>harddisk0partition2msxboxdash.xbe</path>
</shortcut>
put it in c:
and in config.xml i had
<bookmark>
<name>Play DVD</name>
<path>c:msxboxdash.xbe</path>
</bookmark>
but this didnt work, instead it almost gave me a heartattack when the xbox didnt boot.