1. edit the ~/.mime.types file, add the following lines:
type=application/x-bittorrent  \
desc=Bittorrent Seed FIle  \
2. Open the Gnome2 Control Center (gnome-control-center)

3. Select Advanced

4. Double-click "File Types and Programs"

5. Click "Add File Type"

6. Create a new file type with the following settings:
Description: BitTorrent Seed FIle
MIME Type: application/x-bittorrent
Category: Packages
Filename Extension: torrent
Program to run: btdownloadgui.py --max_upload_rate 1 %s
7. Click Ok

NOTE: You may need to restart Galeon after doing this for it to take effect.