Refresh from Microsoft Excel

Question:     

I have a challenge.  In my new organization, they use Real Time Enterprise instead of MS Project.  The Task Order Schedule is at least 9k lines.  I can export to Excel but I'm not sure how to build a Milestone chart with the key deployment tasks that we need to monitor.  What would you suggest?  That RTE file has UIDs so that's good.  But I'm spending way too much time comparing last week's schedule to this weeks.