Ubuntu Servers :: NFS - Exporting Multiple FS With Single Line?

I'm using my home server to netboot into live CDs. To summarize that article, netbooting a liveCD system involves passing an NFS host:/path in kernel's command line, which is subsequently mounted as /cdrom on the live system. The article mentions copying the contents of the iso image to a place on the hard drive, but I see no reason for this, since the contents need to be read-only anyway, which is easy to achieve by mounting the iso through a loop device:

Code:

# mount
...
/dev/loop0 on /mnt/kubuntu-lucid-amd64 type iso9660 (ro)
/dev/loop1 on /mnt/kubuntu-natty-amd64 type iso9660 (ro)

[code]....

Now, I am using NFS to mount a regular (rw, HDD) directory which I use as a network drive and I can mount any subdirectory and still access all the files within, ie. when I export /data on the server, I can still mount /data/downloads on the client:

Code:

server:# exportfs
/data 192.168.1.4/32
client:$ sudo mount -t nfs 192.168.1.1:/data/downloads /mnt/netshare

[code]....

Is it possible to export just /mnt and be able to mount any/all of the subdirectories? NFS doesn't like going across multiple file systems:

Code:

server:# ls -al /mnt/kubuntu-natty-i386/
total 3532
dr-xr-xr-x 11 root root 4096 2011-04-27 11:29 .
drwxr-xr-x 7 root root 4096 2011-07-25 21:46 ..

[code].....

When I try to export just /mnt and mount /mnt/kubuntu-natty-i386 on the client, the mount succeeds but the mounted directory is empty.