This will create a list of all your posts in one specific category. They will be ordered alphabetically by category.
You can put this as a list in your side bar.
1) Download, unzip, upload to your plugin directory and active the plugin.
2) Open categoryofposts.php in a text editor like notepad ( NOT WORD! ).
3) Go to Admin->Options->Category of Posts and enter the number of the category you wish to list
4) Add the following code to your sidebar:
If you need more information try here: