I simply can not get it to use the right fork. I am guessing that I am simply having problems with the client using the new config information. I don't really know.
If you follow the steps you get connected.

But we need more nodes!
Sync to the new blockchain first. After your block height is over 1054525, type this command at the console:
getblockhash 1054525
It should return you: 0000069fe492a858cd98eb67f11137b5568dd84c0327483817b8c55a881aa8af
If not, you are still on the wrong fork. You will need to do the steps 1 to 5 carefully again.
Remark: for those still stuck with the last official block height 1051199 and never connected to the wrong fork before, there is no need to do steps 1 and 3.
Edit my latest checkpoint:
getblockhash 1058092
f1f6b3ccc96fd8a67091da8b5392f27319a72f9c79dc826ae29ba5751513121e
Edit2:
A few minutes later...
