I'm going to create a PHP Link Directory for the purposes of coop weight. I'm looking to have something which is well indexed in teh 10k+ range so it has a lot of weight in coop add network. What is the best approach for this?
Why don't you create a quality website? Instead you're trying to spam the search engines with results only meant for your co-op benefit.
I do have a quality website in my signature, but thats not how google works nor does coop so you do what you gotta do.