How to add the GZ beam to a cavern location

I've been trying to find a way to get the Great Zero's beam to appear in the new Pub (as it's located in Ae'gura) and I finally had a breakthrough! This'll be handy for anyone working on a cavern location who would like the GZ beam to pass over everything.
Behold!
A rough draft of the tutorial is done for now, but there will be additions later. For instance, a section needs to be added to make the beam only appear when the actual GZ is activated on a shard.
http://www.guildofwriters.org/wiki/Great_Zero_Beam
If anything doesn't make sense, let me know and I'll see if I can clarify. If you find any tricks or shortcuts while doing this yourself, feel free to add them to the tutorial. Good luck!
EDIT: Thanks to some help from Deledrius, we eliminated the need to work in PrpShop entirely! I also added more pics for reference to make things easier.
Behold!
A rough draft of the tutorial is done for now, but there will be additions later. For instance, a section needs to be added to make the beam only appear when the actual GZ is activated on a shard.
http://www.guildofwriters.org/wiki/Great_Zero_Beam
If anything doesn't make sense, let me know and I'll see if I can clarify. If you find any tricks or shortcuts while doing this yourself, feel free to add them to the tutorial. Good luck!

EDIT: Thanks to some help from Deledrius, we eliminated the need to work in PrpShop entirely! I also added more pics for reference to make things easier.