I created encrypted partition on my Ubuntu 11.10.
I followed these instructions

but it works little different then i wanted. It mounts the partition on boot. I don't need this. I need it is mounted when a user needs it. And other problem it is not writable for users Only for root.

If i comment that line in /etc/fstab then the partition is not mounted on boot. then i can mount it as non root user. but it is not mounted to /media/cryptname . it is mounted to some long code name /media/xxxx-xxxxxx-xxxxxx...
And it is not writable to a user. only to root

So my question is:
1. How to mount it to /media/cryptname(to the folder i want) but on user's request, not on boot .
2. How to make it writable for non root users.