I just started playing with all this stuff tonight.. and was interested in getting the hdld_svr.elf working. I don't have a chipped PS2 so I made the ISO and copied to the hard drive and ran it using HD Loader.
Here's a quick tip to make it easier for those of you running home networks in the 192.168.1.x range (such as linksys equipment).
Download a Hex Editor (such as this one: http://www.chmaas.handshake.de/delph...vi32/xvi32.htm)
Edit the hdld_svr.elf file, and do a search for "192.168." It should take you to the section that says 192.168.0.10. You can change this IP to any that works on your network, as long as it fits the same number of digits (IE> the total IP including periods can't exceed 12). The next number, 255.255.255.0 is pretty standard and shouldn't need changed. The next IP is your gateway, which has to follow the same rule for the IP except you're limited to 11 digits.
Then just save the edited file, and follow the rest of the instructions to make the ISO using the hdld_svr.elf, and run on your PS2 however you choose.
I hex'ed mine to be an IP of 192.168.1.13, and a gateway of 192.168.1.1 instead of the hdld_svr.elf defaults, and it came up fine. The PS2 took the IP I hex'ed, and I was able to connect fine from my PC.
Just figured that would be alot easier than ppl changing their whole network around, or trying to use a cross-over cable.