I would like to change some behaviour in EPiServers category picker dialog. For example, if the editor checks a child node, the parent node should also be checked.  

I am new to dojo but have been reading around. Would it be best to somehow extend EPiServer category widget and override some method with some dojo magic? Or should I go for some ohter dojo widget like http://www.thejekels.com/dojo/cbtree_AMD.html ? 

Any one that has done something simular?