[Planner] properties

[Miles <miles jamkit com>]

Hi,

I would like to use the ability of planner to attach custom properties 
to tasks/projects.

I want to label each task with a 'client' field and an 'accounts code' 
field.  Accounts codes correspond roughly to the 'type' of task - 
support, graphic design, development, etc.  If possible, I want to be 
able to specify a list of options for each property, so that I can avoid 
re-typing each time.

Am I right that I can do this in planner?  And if so, how - I'm not 
clear on how I set it up like this

Many thanks,

miles