Basically this problem arises with any software...how to remember the shortcut keys. Especially if you use a few different applications.

A lot of apps do not have any simple way of looking up the shortcuts, and even fewer display the code behind the shortcuts. So it is pretty normal to rely on a list, printed or otherwise, provided either by the developers or by the community or by oneself.

Being able to assign shortcut keys is really important. What I generally try to do is keep the same set of shortcuts no matter what app I am using.

Imo being able to view the code and even better to be able to tweak it is a great advantage. I'm just waiting for that tutorial explaining the ins and outs of simple coding in MoI :)