Here's a snip:
#!/bin/bash
#set -v
iptables='sudo iptables'
tc='sudo tc'
#$iptables -t mangle -F
#$iptables -t mangle -Z
#####################
## Traffic Shaping
#####################
## Parent ID: 1, Associated with iface: eth0 -- External Interface - Internet Side.
$tc qdisc del dev eth0 root
$tc qdisc add dev eth0 root handle 1: htb r2q 1
$tc class add dev eth0 parent 1:0 classid 1:1 htb rate 900kbit ceil 945kbit
## Optimum Wireless
$iptables -t mangle -A POSTROUTING -s 172.16.254.1 -j MARK --set-mark 1226
$iptables -t mangle -A POSTROUTING -s 172.16.254.1 -j RETURN
$iptables -t mangle -A POSTROUTING -s 172.16.254.10 -j MARK --set-mark 1227
$iptables -t mangle -A POSTROUTING -s 172.16.254.10 -j RETURN
$iptables -t mangle -A POSTROUTING -s 172.16.254.11 -j MARK --set-mark 1228
$iptables -t mangle -A POSTROUTING -s 172.16.254.11 -j RETURN
$iptables -t mangle -A POSTROUTING -s 172.16.254.2 -j MARK --set-mark 1229
$iptables -t mangle -A POSTROUTING -s 172.16.254.2 -j RETURN
$iptables -t mangle -A POSTROUTING -s 172.16.254.3 -j MARK --set-mark 1230
$iptables -t mangle -A POSTROUTING -s 172.16.254.3 -j RETURN
$iptables -t mangle -A POSTROUTING -s 172.16.254.4 -j MARK --set-mark 1231
$iptables -t mangle -A POSTROUTING -s 172.16.254.4 -j RETURN
$iptables -t mangle -A POSTROUTING -s 172.16.254.5 -j MARK --set-mark 1232
$iptables -t mangle -A POSTROUTING -s 172.16.254.5 -j RETURN
$iptables -t mangle -A POSTROUTING -s 172.16.254.6 -j MARK --set-mark 1233
$iptables -t mangle -A POSTROUTING -s 172.16.254.6 -j RETURN
$iptables -t mangle -A POSTROUTING -s 172.16.254.7 -j MARK --set-mark 1234
$iptables -t mangle -A POSTROUTING -s 172.16.254.7 -j RETURN
$iptables -t mangle -A POSTROUTING -s 172.16.254.8 -j MARK --set-mark 1235
$iptables -t mangle -A POSTROUTING -s 172.16.254.8 -j RETURN
$iptables -t mangle -A POSTROUTING -s 172.16.254.9 -j MARK --set-mark 1236
$iptables -t mangle -A POSTROUTING -s 172.16.254.9 -j RETURN
$tc class add dev eth0 parent 1:528 classid 1:1226 htb rate 141kbit ceil 169kbit prio 4
$tc class add dev eth0 parent 1:529 classid 1:1227 htb rate 141kbit ceil 169kbit prio 4
$tc class add dev eth0 parent 1:530 classid 1:1228 htb rate 141kbit ceil 169kbit prio 4
$tc class add dev eth0 parent 1:531 classid 1:1229 htb rate 141kbit ceil 169kbit prio 4
$tc class add dev eth0 parent 1:532 classid 1:1230 htb rate 141kbit ceil 169kbit prio 4
$tc class add dev eth0 parent 1:533 classid 1:1231 htb rate 141kbit ceil 169kbit prio 4
$tc class add dev eth0 parent 1:534 classid 1:1232 htb rate 141kbit ceil 169kbit prio 4
$tc class add dev eth0 parent 1:535 classid 1:1233 htb rate 141kbit ceil 169kbit prio 4
$tc class add dev eth0 parent 1:536 classid 1:1234 htb rate 141kbit ceil 169kbit prio 4
$tc class add dev eth0 parent 1:537 classid 1:1235 htb rate 141kbit ceil 169kbit prio 4
$tc class add dev eth0 parent 1:538 classid 1:1236 htb rate 141kbit ceil 169kbit prio 4
$tc filter add dev eth0 parent 1:0 protocol ip prio 4 handle 1226 fw classid 1:1226
$tc filter add dev eth0 parent 1:0 protocol ip prio 4 handle 1227 fw classid 1:1227
$tc filter add dev eth0 parent 1:0 protocol ip prio 4 handle 1228 fw classid 1:1228
$tc filter add dev eth0 parent 1:0 protocol ip prio 4 handle 1229 fw classid 1:1229
$tc filter add dev eth0 parent 1:0 protocol ip prio 4 handle 1230 fw classid 1:1230
$tc filter add dev eth0 parent 1:0 protocol ip prio 4 handle 1231 fw classid 1:1231
$tc filter add dev eth0 parent 1:0 protocol ip prio 4 handle 1232 fw classid 1:1232
$tc filter add dev eth0 parent 1:0 protocol ip prio 4 handle 1233 fw classid 1:1233
$tc filter add dev eth0 parent 1:0 protocol ip prio 4 handle 1234 fw classid 1:1234
$tc filter add dev eth0 parent 1:0 protocol ip prio 4 handle 1235 fw classid 1:1235
$tc filter add dev eth0 parent 1:0 protocol ip prio 4 handle 1236 fw classid 1:1236
$tc qdisc add dev eth0 parent 1:1226 handle 1018: sfq perturb 2
$tc qdisc add dev eth0 parent 1:1227 handle 1019: sfq perturb 2
$tc qdisc add dev eth0 parent 1:1228 handle 1020: sfq perturb 2
$tc qdisc add dev eth0 parent 1:1229 handle 1021: sfq perturb 2
$tc qdisc add dev eth0 parent 1:1230 handle 1022: sfq perturb 2
$tc qdisc add dev eth0 parent 1:1231 handle 1023: sfq perturb 2
$tc qdisc add dev eth0 parent 1:1232 handle 1024: sfq perturb 2
$tc qdisc add dev eth0 parent 1:1233 handle 1025: sfq perturb 2
$tc qdisc add dev eth0 parent 1:1234 handle 1026: sfq perturb 2
$tc qdisc add dev eth0 parent 1:1235 handle 1027: sfq perturb 2
$tc qdisc add dev eth0 parent 1:1236 handle 1028: sfq perturb 2
Like I mentioned before I've tried PREROUTING, INPUT and POSTROUTING.
