Here are the instructions :
(I am currently using Mozilla Sunbird v0.9.)
When you first download and install Sunbird it will look something like this :

To "subscribe" to the calendars click FILE -> SUBSCRIBE TO REMOTE CALENDAR

Choose ON THE NETWORK

Make sure it is on ICS format, and then you need to enter the URL for ONE calendar.
You will need to repeat the steps for each calendar.

- Code: Select all
http://www.hwhq.com/releases/360.ics
http://www.hwhq.com/releases/wii.ics
http://www.hwhq.com/releases/psp.ics
http://www.hwhq.com/releases/pc.ics
http://www.hwhq.com/releases/ps3.ics
http://www.hwhq.com/releases/nds.ics
Choose a color and name for the new calendar:

When one is added it will look something like this:

You can remove the bars and such (just drag it up or off to the side...).
Once you have them all added it might look something like this:










