Would this method work to rank a main site
Buy domain names that have real pr ,say pr1 minimum
Place unique articles on them written for the keyword you are looking to target, and place a anchor text on the site for your keyword to your money site.
Giving your main site a real pr link that has relevant content
Please give me your views
Just one other question when buy a pr domain would it be best if the domain name had the part of your keyword in it?