tikev

hi there i am a newbie in multiboot dvd I managed to create a multiboot with xp pro, ubcd (bart pe).. but i can't integrate avast bart cd to it. when i try to launch it by virtual pc through the cd shell menu avast is loading (alwil software image) and crashes telling me that "aswshell.exe" of avast bartcd can't be loaded. can anybody help me please!! thx tikev