not sure about rev limiter, but you can buy a speed delimeter off ebay pretty cheap, its a little black box that you wire in either between the ecu and the dash, or the engine and the ecu, i cant quite remember! i remember the person that did it on my dc2 had done it the wrong side of the ecu, and it mucked up vtec in first gear.
if you buy a piggy back ecu (which will be the expensive way) they can get rid of both i believe.