How To Secure /tmp,/dev/shm Without Access To OpenVZ Hardware Node?

I have recently picked up a CentOS5 server running on an OpenVZ box. Going thru various guides, I have seen repeatedly the importance of securing the /tmp partition. However, I am running into trouble when I try to follow the usual commands [1][2]

For example:

# mount -o nosuid,noexec /media/tmpFS /tmp
mount: /media/tmpFS is not a block device (maybe try `-o loop'?)
If I check for the presence of loop, it is missing:

# ls -ltr /dev/loop*
ls: /dev/loop*: No such file or directory

If I try and create loop using /sbin/makedev loop and re-execute the mount command, I get a new error

mount: no permission to look at loop
The nearest I have found so far is this thread [3], which suggests using

mount -t tmpfs tmpfs /tmp
I believe the above will not persist across a reboot, so that defeat's the purpose.

Can you advise on how to mount /tmp in noexec,nosuid mode within the VPS environment?