I have a truecrypt encrypted volume which is my entire hard drive. This contains the windows OS and my files(one of many backed up encrypted copies). I would now like to implement a 2nd truecrypt volume inside this present truecrypt volume. Truecrypt calls this a hidden volume. The idea is that at boot-up, you can use one of two passwords. The one you choose dictates which (the primary or the hidden) volume. The easy way to do this is to do it when first creating both truecrypt volumes but I did not realize I wanted to create this hidden volume until now. All of the instructions I have seen require you to dismount the encrypted volume which will host the hidden volume first. However I can't do that because I need that volume decrypted in order to run the truecrypt software which performs the function.
Any ideas other than decrypting the encrypted volume and starting from scratch?