In the latest eVoodoo you can choose to play the games in windowed mode.
So when you press alt+enter as glide64 asks you to, the emulator remains in windowed mode, and displays the gfx in the window. Pressing alt+enter once again switches back to the screen posted above.
I know (I can read hopefully) how to make eVoodoo go to fullscreen mode, but what I want to know is if it is possible to do it when playing. I've tried to do it through the control panel while PJ was running. I had to press alt+enter twice, the first frame appeared in fullscreen, then eVoodoo crashed. I assume it is not possible at all, but I wanted to be sure.