SEO/linking strategies for 33 old domains

[SexVideoContent]

I know the basics of optimizing a page for SEO but have some questions about setting up a linked network. I know this is lengthy but I've never seen this addressed anywhere.

I have some (essentially) unused domains that are almost all over 1 year old - and presumably out of google's sandbox - some have PR, and I'd like to set up some type of small network with them to gain SE traffic.

Just looking for suggestions/critiques of my strategy:

I have one PR4 to play with, 8 PR2, 8 PR1, and 16 PR0 (don't know if these are even indexed yet)

I was thinking of setting these up in groups of 3 or 4 of the lowest PR, with each site linked to one another, and also have each site with a one way link to one of the PR2 sites.

Then take a group of the PR2 sites, link all of those together, and have each with a one way link to the PR4 site.

So it ends up making a group of small independant groups of 3 or 4 sites linked to one another, with one way links to a 'minor hub' site; these 'minor hub' sites are linked together and also have a one way link to the 'major hub' site, which I expect would get some benefit from having all the other sites linkiing to it directly or indirectly.

Any comments on the above approach?

My questions are:
1. Should I set up each of these domains on a different class C IP? Right now they are all on the same IP address.

2. If yes to the previous question, should I also assign each of them to a separate nameserver?

3. Most of the domains have keywords in the url, however most of them aren't really the keywords I'd like to target; when I create pages for the site should I put the text and the links on the index.htm page or on a page like domain.com/keyword.htm ?

4. If I make a page on one site like domain1.com/keyword1.htm, should I link it to a page named domain2.com/keyword1.htm on the second domain, or should I use some variant that contains the keyword in the page name on the second domain?

5. Would it be adviseable to target a second keyword on a domain? Such as having domain.com/keyword1.htm as well as domain.com/keyword2.htm, a second page targetting a different keyword?

6. If so, and the linking scheme is already in place on the keyword1.htm pages, should I duplicate the linking scheme between the same sites for the keyword2.htm pages? My concern is that might seem unnatural and get flagged by the SE; if that is so, should I just set up totally different links for the secondary keywords, to sites not in this group described above?

TIA for any replies to this lengthy post.