How to set the Shift + End to select to the end of line?

I'm using MonoDevelop 2.6 on MacOS X Snow Leopard.

Is there a way to customize the Shift + END (and Shift + Home) key combinations to select only to the end (or beginning) of the current line, not to the end of the document?

I suppose there is an option somwhere in MonoDevelop for customizing the cursor position after an End or Home key (choosing between EoL or EoF), but I cannot find it in the keyboard settings.