Some solutions for 4 X 8
..0..0..0..0..1..2..0..2....0..0..0..0..0..0..1..1....0..0..0..0..1..2..0..0
..0..0..0..0..0..1..0..1....0..0..0..0..0..1..0..1....0..0..0..0..0..0..0..1
..0..0..0..1..0..2..2..1....0..0..0..1..0..2..2..1....0..0..0..1..0..1..2..0
..0..0..1..0..0..0..0..1....0..0..1..0..0..0..0..0....0..0..1..0..0..0..1..2
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