The only advice for improving internet i can give is to buy yourself a long Ethernet cable off eBay (it shouldn't cost more than the range extender) and run that puppy straight from your ps3 to either the router or (if possible) a direct outlet. I did so about 6 months ago and it's been borderline faultless ever since. Nothing beats a wired connection
Sorry for my absolute absence over the past number of months, but I've been flat out like a lizard drinking, with everything from working on my GT5 setup, to painting (what has become) the games room, to wiring together a button box. Add to that all the everyday crap that we've all been digging through for a while and i've been a busy beaver.
So, now that i'm close to finishing the painting and the new rig is getting ever closer to usability, I should start sliding back into the fold shortly 👍
PS. It's great to see activity in this thread again, it's been far too long between drinks