routing ranges to different wan links

Hi Guys,

I need to route a range of ips to use a specific wan link.

Range from 192.168.40.2-192.168.40.65 will use lan4( the third wan link available).

Policy route uses subnet, so it would give me a lot of work to do it.

I know that sophos/cyberoam/watchguard/sonicwall can do what i want, im sure that must be a way to do it in fortigate.

Thanks