As someone else was getting at - when this thread started,
You had a custom 0.91 which worked fine with Qbert, but sluggish for other games.
You had a non-custom 0.86 which was fine for other games but lacked the qbert patch.
Most likely, you could have easily set up your frontend to launch qbert using 0.91 and all other games using 0.86 and saved all this effort.
Mainly just posting so others see the options.
And as LilWolf said, it's very simple to compile these days . . .