There's an easier way to do this.
Let's say dinosaurs didn't die out around Antarctica, Right around K/T, South America and Australia were still attached, so dinosaurs spread back into these continents. Of course, as Antarctica cools, the dinosaurs die off there, but they survive on the other two continents.
The ithmus of Panama won't form until 3 million years before the present. Presumably some dinosaurs would get into North America. However, it's interesting to note that no animals in OTL from South America made it into Asia (ground sloths came the closest - they stopped at Alaska). There was also a South American bolide which hit only 300,000 years before this which is thought to have caused a South American mass extinction. So let's say no dinosaurs make it into Eurasia.
Australia is much easier, provided dinosaurs aren't strong enough swimmers to get to mainland Asia.
So you can get humans, presuming you wave away the huge butterflies caused by herbivorous dinosaurs changing vegetation patterns, and hence weather. Of course, history would end up looking totally unlike anything today.
If you wanted dinosaurs and something resembling modern history, they could always survive in Madagascar, or maybe New Zealand. But chances are, similar to OTL, the first inhabitants would wipe out all the large animals on these islands. So we'd be left with a few small dinosaurs, likely theropods, which would be seen in the ATL as being the avian version of the platypus.
