JPEG Compression for LCD Projector
Find out the native resolution of the projector.
Shoot the JPG size that is just larger than the resolution of the projector. You can use the individual image resize feature of FastStone but it is easier to use the Tools/Batch Convert Selected Images/Advanced feature to resize all your images at once to the native resolution of the projector.
Remember that the projector shows horizontal images so shoot that way as much as possible.
Living and loving it in Bangkok, Thailand. Canon 7D - See the gear list for the rest.