Additional Settings For Custom Profile Fields [1.2]

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Still, I don't know what your method to update the user's options.
What I mean is, I think you need php script to do that (by default, as far as I know, there is no do_update_xt_proffields action processed in usercp).

I don't know whether you use the example plugin in this post or not:
http://mybbhacks.zingaburga.com/showthre...http://mybbhacks.zingaburga.com/showthread.php?tid=1271&pid=1140
In the example plugin above, for example, if you want to display the Display users' avatars in their posts checkbox setting, you only need to put {$showavatar} variable in your main User CP page (the checked/unchecked status already included - I think).

I'm sorry if I misunderstand what you mean.