Some questions about the yacs!thanks!

YACS is really a good project for those who want to built a community!but I am a newbie.So when i setup,there are some questions for help,thanks! 1)How can i put a session or a category at the top,such as 'features and design','new releases' 2)If I haven't installed the GD on my server,but Imagemagick,will the picture works well??

Thanks!! :D