PID doesn't change, the nature gets stored in 0x41 upon transferring.
Basically the game stops looking at the PID to calculate nature, it's stored in a simpler location.
Those hex guides were for Codr so that he could implement them in PokeGen so you don't have to worry about them.
IIRC, when you make a Dream World ability Pokemon, the 0x42 is set for you so you don't have to modify it.
Again, it's just documentation and is handled by PokeGen.
Loaded the file in PokeGen, resaved.
http://min.us/mveHOWA
0x78-0x7A hexes were unset, which is date egg received. Probably this.
0B 03 11 is today, which I put in.
Changed it to route 209, since I don't know what you initially specified.
We know of codes from loadingNOW that do the same thing, but aren't for VBA (they are for the actual game+AR). Event flags and stuff.
Thanks, we'll be looking in to this!
Most likely not, as you can trade the jap dws to the english games to breed. Not sure about unbreedable ones.
Go inject them into your Entralink OP via PokeStock's PokeCGear, found on the forums.