we have multiple php pages that we used to require to add to our home pages across multiple sites...

we still wish to use them across all sites but would like a better way to do it the pages are different types of button collections and advertising pages with links to specific pages across all sites so they are kind of important to us. but using the basic page edit tool does not allow the inclusion of PHP code and pasting the data into the page means we loose the one point for edit and update our adds. what is the easiest way to accomplish what we want to do. or is there a plugin that will do this for us. it would be nice if we could assign each to a widget that could be added to the home page in the location we chose. but that would mean making each of these a plugin which means added time developing so we are looking for an easy way to accomplish this. any tips would be greatly appreciated. we have about 9 pages in all they are also all PHP.