I have nearly 25 domains. I have a main web site. I want to use all these domains for the SEO benefits of the main website. I can't think of setting up 25 individual websites soemthing like a virtual website or something ? any suggestions friends ?
I think you need to create 25 related websites and link to the main site. If all your 25 website has a page rank of 0, I don't think there is much benefit to link to the main site.
I don't see how you can do it. Google can see if you are interlinking between your own sites and penalise you for it. Why did you get the domains without a plan?
initially my plan was to have local domains with location name coupled with main domain. now there is a change in the plan and it seems its very difficult to manage individual websites.
If you want some intelligence in the thread, Barre Tire is on the right track. You have 2 options. Either drop the domains or go with a central CMS. I'd recommend going with wordpress. There are a lot of plugins and extensions that will make it pretty easy to manage (or easier) multiple sites at once based off of a central site. Other wise, drop the rest of the domains and ignore them. Unless you have different c-class IP's, who is info, etc., there is no point. Google will see the interlinking and if they don't deem it as very useful, penalize you much more than those 24 backlinks can help. Backlinks are easy to come by but don't hurt yourself in the process.
You can easily create a small network of (auto)blogs that link to your main site from time to time. This is a good way to gain related, in-content backlinks for free (domain + host doesn't cost much). For best results you should use SEO hosting, but even if you setup them on 3-4 different IPs will do the trick.