All has been running well but I've recently connected a slingbox to one of the switch ports and this is streaming out to the internet. Due to my providers bandwidth caps I want to limit both daily and monthly total transfer rates on this device. (5Gb per day, 50Gb per month would be ideal).
After much internet searching I found this firmware which would seem to do exactly what I need.

1) Are the bandwidth quotas only relevant to WAN traffic or do they also cover traffic between local hosts? In my scenario I need to limit local host traffic only. IP is fixed on the Slingbox
While I'm here.....
1) I noticed that there is a prebuilt image for the WRT150N (hurrah). Should I flash the WRT150N back to linksys firmware before applying or should I be able to flash directly?
2) Can the software assign the WAN port to be used as an additional switch port (no issue if not)?
Thanks
Tolax