To create an article on WikiPCI.org, first register. Once registered, type the name of the article you wish to create in the search box that is visible on the top right corner of the page. If an article with that name already exists, then you can edit it. If an article with that name does not exist, then you can create it by clicking "Create Page".
Consider adding an Infobox box to articles about Guidewires. See Help:Guidewires.