Hi James,
Presumably they are a salary employee? That is why the hours will make no difference.
You can either process 2 wages separately, or in the paycheque screen in the top right hand area you can tick the box for Advanced Hol. Payment then select 2 holiday periods. It will change to holiday, but you can just change it back.
This will then allocate the tax over 2 periods so that the pay is also correct.
I hope this helps!
Kind regards,
Sally McIntosh (sally@samsolutions.com.au)