InDesign opens them as easily as PM.
Text flow can be a problem is some circumstances, so a bit of fixing will be in order.
BTW, a slightly more descriptive title will get you more help when you need it in the InDesign Forum. There is only 4 or so, of us who pop in here at the PM Forum but in the busy forums Non descriptive titles of "Please Help" often get ignored.
Thanks for the quick response and the suggestion for future visits to the forum. Have a great day!