Scart to VGA converter schematics

I’m wanting to build a TFT and OHP based projector. The cheap TFT display that I’m looking at only has a VGA input. Does anybody know fo a circuit to convert Scart to VGA without loosing a lot of quality?

search says:

http://www.tkk.fi/Misc/Electronics/circuits/vga2tv/circuit.html

http://www.avforums.com/forums/interconnects-speaker-cables-switches/199751-diy-scart-vga.html

Cheap to buy:

http://www.amazon.co.uk/Hama-SCART-To-VGA-cable/dp/B0002W69MY