Visit the blog entry you are working on and click the text tab on the Wordpress Visual Editor and replace any HTML with your raw HTML.
Load the Page back into the editor and save the page so you get a processed page that works in all major browsers.
For a page built in the P&E page builder in WordPress visit the plugin page and click manage page on the page you are working on.
Click HTML source and replace the HTML. If it was a new page click create page and then save in the editor you will be
sent to the wordpress plugin page, name your page and click the HTML source button and replace html. Click Save, load
the page back into the editor to process your HTML and save.
Pages built outside of wordpress at PlugNedit, click the load page from the menu on front page. Load your page into the editor and save.