how can i install more pkgs from cdrom?

[hong jun <hj_182002@yahoo.ca>]

thank you for your help

now i can use my cdrom ,i can use ls to see its subdirectorys. 
but i occured with this question: now it's impossible for me to use the
net ,but i had burned 4 CDs of debian-hurd-K3.and how can i install more
packages from them? 
with the first CD in the driver i tried :
$apt-cdrom add
and it replied:
Using CD-ROM mount point /cdrom/
Unmounting CD-ROM
Please insert a Disc in the driver and press enter
Mounting CD-ROM
E:Unable to stat the mount point /cdrom/ - stat(1073741939 Value too
large for defined data type)
Failed to mount the cdrom


which command should i type ?

please help me.