just a question :

the 10.5.2 installation program can't mount other partitions or USB disks except the hfs formatted disk. If i use 5 minutes later the 10.5.1 i can mount everything.
Is it logic for you?
Could this be due to a bad dvd burning (as you say eddie) or bad image (but in that case i wouldn't be able to burn it, isn't it)?

thanks