LARTC - Oct 2004 - Multiple default routes

Hi

I have been trying to setup multiple defaults routes with equal
weighting I can do it with 

route add -net default gw 10.18.141.254
route add -net default gw 10.18.141.252
route add -net default gw 10.18.141.253

but if I try this setup with ip r i have to place each one on different
weight levels

oh and its on the same interface

Alex