hi !
is there a freeshard that supports stygian abyss and can be used for testing ?
otherwise it'll be hard to test since the server/shard needs to support it too, and you can't connect to the original osi servers with iris.
what's also needed is documentation about the network protocol changes for stygian abyss, for example the source code of the server/shard modifications would be good to read.
also if iris should be able to load stygian abyss datafiles, there has to be documentation for them, we have to rely on the uo community to come up with that.
overall i'd say the uo community first needs to develop serverside-support and document the datafiles before we can make an attempt to support the new stygian abyss content. the vetus-mundus shard is already experimenting with stygian abyss and allows stygian abyss clients to connect for a closed group of betatesters.
current priority for iris is rather performance improvement and usability (especially a ingame dialog for setting hotkeys)
depending on what you want from stygian abyss it might be already possible by modding iris, and without needing the stygian abyss client data if you want to make the 3d models yourself anyway :
the iris walkcode can be changed to allow "flying" for certain playerbodies, but the server needs to support it too.
Making gargole bodies available to players and attaching weapons to them is also possible, see
http://iris2.de/index.php/CharacterModelOverride