I found the previous script maxed out the JFFS partition, and made it impossible to make any changes to the settings.
I managed to get an Adblock-based script going using this guide. It can be followed until you're asked to add iptables rules, as the firewall-start scripts are in a different...
Figured it out by adding a sleep line at the start. I would hazard a guess at the script outpacing the WAN, and not being able to get the block list.
sleep 8
wget http://winhelp2002.mvps.org/hosts.txt -O /etc/storage/dnsmasq/hosts
cat /etc/storage/dnsmasq/hosts >> /etc/hosts
killall...
I'm having trouble getting this command to work on firmware 081. I've copy/pasted the command to the Router Started custom script area, and it seems to stick when looking through SSH too. Looking back on the logs, the host file only has whatever I have defined previously to name the devices on...