How do I mount an existing Truecrypt container on an AOSP rom like Cyanogenmod? I have an existing Truecrypt container (AES encryption), how do I mount it on my AOSP rom?
I have already downloaded Cryptonite (which contains Truecrypt in command-line form) but I'm not sure what I'm meant to do next?
In order to access TrueCrypt containers/files, you need to use 3rd party apps like EDS or Cryptonite. For the latter, which you already have, follow the instructions in their FAQ to mount with correct permissions:

truecrypt --fs-options="uid=1000,gid=1000,umask=0002" volume.tc /sdcard/tc