DIY-projector in use.
Demolux overhead projector
17" Samsung LCD-panel with anti-glare coating removed
Some cardboard and tape for the cover.
Turned out extremely nice. It's big and ugly, but makes a good ~100" picture. Total cost for the sound and video setup ~50eur, so I'm pretty darn satisfied with the outcome.
Next step is to make thicker curtains to block the light from outside.