Actually you've got that concept backwards. Increasing rake offset will reduce steering trail and reduce stability. Reducing rake offset increases stability and the tendency for a bike to travel in a straight line. http://yojimg.net/bike/web_tools/trailcalc.php http://www.phred.org/~josh/bike/trail.html http://www.phys.lsu.edu/faculty/gonz...9no9p51_56.pdf.
Modern popular road bikes commonly have relatively steep head tube angles, 72 to 74 degrees and rake offsets in the 40 to 45 mm range. Of course there are exceptions.
The fork in question and found at the linked site is probably suitable for an older frame or a touring bike built with a more relaxed head tube angle and 27 inch wheels. It may be perfect for your bike, I let my curiosity get to me.