Container skins are just added to the ../webskin/container directory in your FarCry project. The container management area will list all the skins in the directory using the displayname given or the filename if no displayname is available. Your skin needs to contain the #containerBody# variable. An example might be:
../webskin/container/someskinname.cfm
<!--- @@displayname: Container Skin Name ---> <cfsetting enablecfoutputonly="true"> <cfoutput> <div class="superlist"> #containerBody# </div> </cfoutput> <cfsetting enablecfoutputonly="false">