First add the furnidata. Make sure you add it in the right space (if it's a floor item then add it between the <roomitemtypes> tags and if it's a wall item then add it between the <wallitemtypes> tags. Then add the swfs into dcr > hof_furni. Then add the icons into dcr > hof_furni > icons. Then...
Rune Rock is there, look under Seasonal Crackables > Xmas '20 Crackables
As for the category, it's pretty easily done by yourself but I won't do Xmas Comeback because it's pretty useless for a retro.
Updated Catalogue: https://git.krews.org/Ultra/complete-ams-catalogue
Will be added in the new release.
Here are the sqls if that's all you need.
INSERT INTO crafting_altars_recipes VALUES ('11620', '299');
INSERT INTO crafting_altars_recipes VALUES ('11620', '300');
INSERT INTO crafting_altars_recipes VALUES ('11620', '301');
INSERT INTO crafting_altars_recipes...
1. Download the clothing furni swfs and icons from where ever you like, I use http://furniload.com/. Place the swfs and icons into your dcr/hof_furni and the icons into your dcr/hof_furni/icons respectively.
2. Add the missing furnidata from https://www.habbo.com/gamedata/furnidata_xml/1. Place...
Here is an updated and organized Arcturus Morningstar Catalogue.
Added all new and missing furniture.
Added all new clothing.
Organized catalogue to appeal to retro players.
Added all (most?) icons, headers, teasers, and page...