Anyways enough mods have been updated or built for 1.6.4 that it was again possible to make the map. Im hoping its bug free and playable. My test runs through it seem to work. There are many ways to complete the map and it might be harder or easier depending on how you play it. It is challenging and will take up some time to get done. I hope you enjoy it and feedback is always welcome.
Here is a link for all info about said map
http://www.minecraftforum.net/topic/1161299-164modsdns-techpack-the-great-4-x6-survival-map-v14-now-with-more-minecraft/
Right now its IS available through the DNS techpack v6.0.9.1 If you already have that version installed just click reinstall and it will show up in the optional mods list and you can download it.
Make sure it is done downloading BEFORE you click "I've download mod" or it will make you do it again.