Can you really have one Wordpress instance run domain.com/articles and domain.com/tips as the relaxation from the site could be run by Zend Framework?
You are able to install Worpress inside your root domain. Result in the home page from the Wordpress install the present home page of the website with all the links, designs, and original site subfolders maintained. Then simply have Wordpress take proper care of another Web addresses that you simply defined above, ensuring to not create any Wordpress sites that conflict using the current site sites.
What you might do is setup a Wordpress MU site. possess the install on domain.com/articles and domain.com/tips and so the relaxation from the site should not cause any problems.
The only real downside is you essentially have two sites for 2 parts of your website. I simply did a Wordpress MU build also it got just a little tricky but ultimately everything labored and it is pretty simple to update, just an additional click or two.