Sort column in alternating manner

[mbsysadm]

Hello all, I can't seem to figure this one out and google strangely can't answer my questions (have also tried searching these forums). Perhaps I am not asking the right way, but I am lost.

I have sets of data... like so:

A word text blablabla
B word text blablabla
A dog cat france
B dog cat france
B this that other
A this that other
A tiger dragon monkey
B tiger dragon monkey

My source data I can't get to sort alternating on columns A and B, and I would like the data to alternate A-B-A-B-A-B while retaining the pairings of data in the adjacent fields. Is this possible?

[shg]

Helper column?

	A	B	C	D
1	Hdr	Hdr	Helper
2	A	word text blablabla	1	C2: =COUNTIF(A$1:A2, A2) + (A2="B")/10
3	B	word text blablabla	1.1
4	A	dog cat france	2
5	B	dog cat france	2.1
6	B	this that other	3.1
7	A	this that other	3
8	A	tiger dragon monkey	4
9	B	tiger dragon monkey	4.1

Sort on that.