Customization can be essential, especially for keyboard shortcuts that guide menu options, commands, and macros. If you tend to customize TextPad, would a table of your TextPad keyboard shortcuts be useful to you as in the example found at: http://www.anova.org/target/kb-shortcutmap.gif?
The last step (the List button) seems to come pretty close to your requirement, doesn't it?
It opens a [Command Results] window with all the commands and shortcuts in a text document .. offering the convenience of copying, or even better: the use of the [Find] dialog.