Converting from MS Publisher to ID isn't a very common problem, since Publisher isn't very commonly used on the professional end.
Your best bet is to just recreate the files you have to have in ID. If they don't require a lot of changes (esp. text only), you might be able to export the publisher file to a PDF then place it in ID. You could then place a textbox (with background color) over what you want to change. That of course depends on the complexity of the original (backgrounds, overlays, etc.).