I hope dj can correct me if I'm wrong but this is what I think he did:
If you unzip the iglooshelter.ztd file, you will find that he modified the applicable ingame animal .ai files so that they would like the new shelter:
Taken from the dj's reindeer.ai file
;SHELTERS
;Stable1
v = 8113
v = 15
;Stable2
v = 8114
v = 20
;Stable3
v = 8115
v = 25
;Igloo Shelter
v = 8309
v = 25
Then he wrote the shelters .ai file (igloshel.ai) copying appropriate information from one of the ingame shelters.
Pretty simple actually. Don't know why I never tried it. Well done dj.
I may be wrong here again but as most of you know, there have been issues surrounding guests using user-created picnic tables/benches etc. I think we may have the same issue here where dj's shelters will not be compatible with anyone elses (for the same animal). I repeat, this is not confirmed.
-Markbell
ur so right mark ..and yes ..if someone ales would do a shelter for say the reindeer ..then it might conflict with my shelter ..but it wont mess up the game like when u edit the guests.ai ..the animal would just not use/like it
-Dj_Pluffs