Diagram for a 10bT crossover cable

(straight side)	               (crossed end)
white-orange (1)   ---------   white-green (1)	
orange (2)         ---------   green (2)
white-green (3)    ---------   white-orange (3)
blue (4)           ---------   blue (4)
white-blue (5)     ---------   white-blue (5)
green (6)          ---------   orange (6)
white-brown (7)    ---------   white-brown (7)
brown (8)          ---------   brown (8)

Basically this just means crossing 1 & 3, 2 & 6, and leaving the rest alone.