Reorder the sequence of line groupings/QIF export

Shell Programming and Scripting
1

Hi All,

I need to reorder the sequence of line groupings - specifically the output
from a bank QIF (Quicken Interchange Format) export.

Sample is like this:

!Type:Bank
D12/05/2008
T-10.00
N1
Details of Charge 1
^
D07/05/2008
T-20.00
N2
Details of Charge 2
^
D17/04/2008
T-30.00
N3
Details of Charge 3
^

What I need is the following with the oldest transaction as the first line:

!Type:Bank
D17/04/2008
T-30.00
N3
Details of Charge 3
^
D07/05/2008
T-20.00
N2
Details of Charge 2
^
D12/05/2008
T-10.00
N1
Details of Charge 1
^

Even better, would be the above but without the "N" Entries.

Any assistance with doing this is with sed/awk/perl, would be appreciated.

Thanks,

Mark