How to create image gallery?

See the docs:

• https://code.google.com/p/wordpress-custom-content-type-manager/wiki/FAQ#How_do_I_add_images_or_video_into_a_custom_field?
• https://code.google.com/p/wordpress-custom-content-type-manager/wiki/Image
• https://code.google.com/p/wordpress-custom-content-type-manager/wiki/gallery_OutputFilter

Please note that this merely helps you output HTML referencing the list of images. The CCTM does not magically create HTML that is styled or animated — there are many galleries available, you just need to configure your output so it’s compatible with whatever CSS and JS you’ve included to style your particular gallery.