Modify GnuPG Folder for ThunderbirdPortable [USB Drive]

[MLAbram]

Greetings,

I am experimenting with PortableApps.com applications on my 16GB USB drive and have stumbled upon a scenario. Through PortableApps.com there is a ThunderbirdPortable version available which I installed on my USB drive. I then installed the Enigmail addon and then installed GnuPG on the USB drive as well. The challenge arises that there is a folder named gnupg created in the root of the Application Data folder in my user folder where the key data is stored.

My question, is there a way to assign a different path for this folder?

Because this question deals with the folder gnupg, this is why I am posting this question here. If this is not the result of gnupg, please advise and I will direct the question to the correct support group.

Thunderbird v2.0.0.14
Enigmail v0.95.7
GNUPG v1.4.7
Windows XP

TIA