Ha ha, I had that problem last week, so... first I deleted 600 people from my tree at ancestry.com, getting rid of the dead wood, so to speak. And then when I finally got my gedcom under 5000 and tried to import it here, the computer said you can check matches but can't import. So over at ancestry.com I created separate bite-size family trees (under 100 people per tree) and I've been importing things piece-by-piece, lucky I'm on vacation, almost done now. This whole process has actually been very useful, as I slowly merge my tree with the group project here -- now I really know how much of my tree is already over here.