Tutorial
Here are some of the options available for the cf_mggallery tag:
<cf_mggallery cat=4 border=1 rows=3 cols=3 showposter=no showdate=no showrating=no>
cat - options: any of the numbers representing image gallery categories that you have created
border - options:
rows - options: any number representing how many rows you want your gallery to display
cols - options: any number representing how many columns you want your gallery to display
showposter - options: yes, no
showdate - options: yes, no
showrating - options: yes, no