policy routing rule help, ASAP urgent

hi all,
please help ASAP.
i have connection 2 ISP ( ISP1 & ISP2 ), i have public blok IP. i had advertised my public blok IP to both ISP ( i don’t have AS number ). then i want control incoming packet to dst-address that i have will coming from ISP1 or ISP2.

example my public blok IP : 202.53.12.0/24

NAME TYPE RX-RATE TX-RATE MTU

0 R PTP ISP-2 ether 0 0 1500
1 R Gateway ether 0 0 1500
2 R PTP ISP-1 ether 0 0 1500

ADDRESS NETWORK BROADCAST INTERFACE

0 218.83.45.218/30 218.83.45.216 218.83.45.218 PTP ISP-1
1 124.82.63.34/30 124.82.63.32 124.82.63.35 PTP ISP-2
2 202.53.12.1/24 202.53.12.0 202.53.12.255 Gateway

DST-ADDRESS PREF-SRC G GATEWAY DIS INTERFACE

0 ADC 202.53.12.0/24 202.53.12.1 Gateway
1 ADC 218.83.45.216/30 218.83.45.218 PTP ISP-1
2 ADC 124.82.63.32/30 124.82.63.34 PTP ISP-2
3 A S 0.0.0.0/0 r 218.83.45.217 PTP ISP-1
4 S 0.0.0.0/0 r 124.82.63.33 PTP ISP-2

ip route rule :

dst-address=202.53.12.10 interface=PTP ISP-1action=unreachable

from that rule i hope incoming packet to that dst-address will find another gateway ISP-2. is that right ?

No, use mangle to mark packets with action=mark-routing, that you need to redirect to alternative gateway. policy-routing examples,
http://wiki.mikrotik.com/wiki/Routing

please example for me. btw, i can’t use NAT for this..