I use PNG Monster for very good lossless PNG compression http://www.vbgore.com/PNG_Monster http://www.vbgore.com/PNG_Monster Might be worth testing to see if it

I use PNG Monster for very good lossless PNG compression http://www.vbgore.com/PNG_Monster http://www.vbgore.com/PNG_Monster Might be worth testing to see if it can reduce the sizes to an acceptable level.