Outlook 2003, XP Pro SP3

Here is the scenario.

I set up and allocate a task, which is sent by email to the lucky candidate
for the job.

Later I wish to add my notes to the task, which is not allowed, except as an
updated task to the task nominee.

(for example "the task is to chase up an overdue widget order. Today the
supplier, Fred, rings me and I want to make the following update in the
task, and send to the task nominee:- "Fred rang re the overdue widget order;
said he has lost it, can you send to him again please")

These notes are not saved in the body of the task in my Outlook copy. How
do I do this?

(Sorry, I hope above explanation is not too convoluted!)