>Are the help files up to date? For example the second chapter
>seems outdated in 'help dual' below. Also the 75% rule?

Not sure what seems outdated, all of that is still valid.

>And in
>the new command something like 'dual hand', or do you always
>automatically dual your fist when wielding a one-handed weapon
>(provided you have the dual wield skill)?

It's automatic. You don't have to explicitly wield or dual your hands.