You have to call the hideNode in a function. Not in the datablock declaration. I'd suggest doing it in PlayerFloater::onAdd(%data, %player) and then packaging, parenting, and doing it in PlayerFloater::onNewDataBlock(%data, %player). You should also package player::unHideNode(%player, %node); and if they're using your datablock and trying to hide one of the foot nodes, don't parent it. If they're hiding all of the nodes then you should call hideNode on the feet again. You should also hide RPeg and LPeg just incase.
For raising both hands just do:
function YOURWEAPONIMAGE::onMount(%data, %obj, %slot)
{
parent::onMount(%data, %obj, %slot);
%obj.playThread(1, armReadyBoth);
}
I believe the rapid click animation is activate2. Just do it like above but use onFire instead of onMount.