Originally Posted by Libertine

Some more info is needed, I think:

Is the file remote or local? If it's remote, you probably should retrieve it, store it locally and include it with a simple php include. If it's local, you can just use a simple php include.

Is the file a full html document or a snippet of html that uses the same formatting style as the page its in does? If it's a full html document, simply including it will most likely cause layout problems. If it's a snippet, it might still cause problems, but those should be easier to solve.