is it possible to use this in a script?
I want the White Wyrm to temp freeze it's attacker. So when it's a pet, it'll also temp freeze it's attacking/

Yes, you can add a call like this

XmlAttach.AttachTo(target, new XmlFreeze(30));

where 'target' is the object that you want to attach it to, and the 'new XmlFreeze(30)' just calls the XmlFreeze constructor with an argument of 30 seconds.

Thank you

So attachments stay with the spawned subject even after they get removed from the spawner via tameing?

Thanks
OS

yes, that is correct.