I suspect that when you cascaded WRT to Netgear, Netgear being the DHCP server, gave WRT an IP address within its normal range (192.168.0.x). Perhaps it is a static IP at this point, though I'm not sure.
Using only a wired connection, can you not enter the WRT via 192.168.0.2? If so, check if it has a static IP or gets it from Netgear always. How did you wire them - LAN port to WAN port of WRT or LAN to LAN? (not that I would know which is the way to go)
So long as WRT is connected to Netgear you may not ever see 188.8.131.52. If you disconnect, reset, and perhaps reset the computer, WRT might well revert back to its normal IP. But do you really want it?
Considering that your internet access is fine, I'd think that those routers are doing a good job. And ipconfig saying that Netgear is a gateway is completely correct. It is the gateway, and WRT looks to the Netgear router just like any other device hooked to it, and then WRT is likely a DHCP server to the PCs connected to it.
Does Netgear have logging? You could try seeing who it talks to and one of the devices would be the WRT router, I would think.
Let's hope a networking expert can help you more. That's all I can think of
Edited by tos226, 01 June 2008 - 10:37 PM.