This week's book giveaway is in the Mac OS forum. We're giving away four copies of a choice of "Take Control of Upgrading to Yosemite" or "Take Control of Automating Your Mac" and have Joe Kissell on-line! See this thread for details.
Another approach could be to create a compound Icon consisting of the default and custom icons side by side (requires much more customization if it is to work with all orientations and text positions, setPressed/SelectedIcon etc.)
TestIcon can be replaced with any Icon.
There are no new questions, but there may be new answers.