Wifi Down After Router Firmware Update

Here's what we have at the house;

1 - Motorola Modem (horrible ISP)
2 - Dlink DIR 655 wireless router (about 2-3 years old)
3 - 2 laptops (windows 7/both)
4 - DirecTV broadband box (can't remember how that hooked up to the router?)
5 - Playstation 3
6 - (3) DTV sat receivers

The problem started while trying to connect the PS3 to the existing network. Only one laptop is wifi, the other laptop and Ps3 are in my room and wired in to the router, and the strange little DirecTV box is in the wired mix(for on-demand i guess?) The PS3 could not log-in to the PSNetwork(still can't), but it could browse the web just fine. So I start manually typing in IP addresses, 6 IP's in all, including the sharing of 3 DTV boxes that show up on the network on my admin laptop. Didn't work, so I get into the DLink router URL and start opening up ports that PSNetwork uses. At this point I think I have it figured out, then I did a firmware update on the router. My laptop, the PS3(internet, no PSNetwork) and even the little DTV box was working fine, all wired in, using 3 of the four ports. The old lady's laptop in the living room not only couldn't get on-line, it couldn't detect a wifi network? So try to set up a new real quick before I left this AM.. No beans!! I looked at the specs for the router, the firmware is up to date but from early 2010, and the features say "NO" to gaming support..

Do I get another router that can handle all the devices and is PS3 friendly, if that's even a thing!? I can't roll back the firmware update cause I wasn't able to back up the settings, and honestly theres a good chance I did something really bad as far as trying to tweak that router to open up ports for the specific IP address that goes to the game console. We'll call it 191.55.55.99. When I thought I was finished, the PS3 IP address had switched to 191.55.55.98? So it dropped down a number, I thought it was static, and all my efforts were for the --99 IP address, basically I have network issues consisting of Satalite tv boxes, a public DTV share folder, a video game console, one wired and one wireless, and a router that I WANT TO SET ON FIRE!