Using espionage ontop of filevault.

I currently use espionage to encrypt several folders and applications.
I'm getting ready to encrypt my entire home directory using file vault and was curious if I could still use espionage on top of file vault. That is have file vault encrypt my entire home directory with password x and then use espionage to encrypt applications using password y.
Are there any known problems with this style of setup?
I'm getting ready to encrypt my entire home directory using file vault and was curious if I could still use espionage on top of file vault. That is have file vault encrypt my entire home directory with password x and then use espionage to encrypt applications using password y.
Are there any known problems with this style of setup?