SQL - Syntax help String Manipulation - SQL Server 2005

Hello experts,

I am really reaching on this one, but I have a scenario that I need help coding please, not sure if it can be done.  I have a table of appointments below, and there are two columns, both varchar(50) datatypes.  The time and date fields were accidentally merged, and I need to unmerge them.  I currently have:

table: appointments
appt_date             appt_time
null                        Appointment date: 02/28/2011
null                        08:00 AM
null                        09:00 AM
null                        10:00 AM
null                        11:00 AM
null                        Appointment date: 02/29/2011
null                        08:00 AM
null                        09:00 AM
null                        10:00 AM
null                        11:00 AM
null                        Appointment date: 02/30/2011
null                        08:00 AM
null                        09:00 AM
null                        10:00 AM
null                        11:00 AM

and I need:

table: appointments
appt_date                                      appt_time
Appointment date: 02/28/2011      08:00 A
Appointment date: 02/28/2011      08:00 AM
Appointment date: 02/28/2011      09:00 AM
Appointment date: 02/28/2011      10:00 AM
Appointment date: 02/28/2011      11:00 AM
Appointment date: 02/29/2011      08:00 A
Appointment date: 02/29/2011      08:00 AM
Appointment date: 02/29/2011      09:00 AM
Appointment date: 02/29/2011      10:00 AM
Appointment date: 02/29/2011      11:00 AM
Appointment date: 02/30/2011      08:00 A
Appointment date: 02/30/2011      08:00 AM
Appointment date: 02/30/2011      09:00 AM
Appointment date: 02/30/2011      10:00 AM
Appointment date: 02/30/2011      11:00 AM

update appointments
set appt_date ?

Thoughts?

Thanks!