Profiles

Hi,

I downloaded and installed Thunderbird Portable on a USB Flash Drive, it works fine but I would like to create many profiles because with Outlook Express I used many identities.

I read that you can manage (create/edit/delete) profiles through "profile manager" and you can reach it typing string to the url to .exe file plus "-p" option in the "start->run" prompt, e.g.:
"C:\Programs\Mozilla Thunderbird\thunderbird.exe" -p

Actually it works on my C installation, but it doesn't work on my Flash Drive installation, in fact if I type:

"Z:\PortableApps\ThunderbirdPortable\ThunderbirdPortable.exe" -p

it just open Thunderbird Portable without prompting the "profile manager".

Is it impossible to manage different profiles on a Portable installation?

Thanks.