For everyone having the ERROR_CALLBACK problem :
I copied the RTP files somewhere else when the error happened, then I copied them back into the PATCHES folder.
Then I put them in READ ONLY and started the patcher. And it finally worked, though the patching was slow as hell.
When it's all done, don't forget to empty our patches folder cause the patcher won't be able to do it since the files are read only.
If it works for you please spread the word.
I've been stuck with 63 to 69 but now it's all good and I can play the game.