If you wanna adopt armors between chronicles - like new one from Erthea, you'l need gildors tool cost 50$, also you'l have documentation ref. how to use it, plus to that - closed thread in gildors.org/smf forum, where people can help you out - with your adoptation, but trust me if you have no idea what its like to adopt stuffs, its take a while for you,
1. step - extract meshes(UKX)& textures(UTX) using Umodel - files should be placed together, then you have to import them back using UT2004(Patched with gildor)) - applying proper properties for each race mesh( X Y Z - position & rotation -16384) then you have to apply correct texture - require Shader, Finalblend - for upperbody.lowerbody.boots,gloves. And finally you have to change .dat files - by making correct path to your .ukx package - like ErtheiaArmor.MDarkElf_m019_u , for boots,gloves etc.