macro to stack/transpose select rows (cpm)

[sandy_eggo]

Given an xls with 2000 rows and data formatted A5:L5 (1R x 12C) as
follows:

<PRE>
AAA BBB CCC DDD EEE FFF GGG HHH III JJJ KKK LLL
</pre>

How would I stack the data so that each row becomes formatted as
follows (each remaining "pair" stacks beneath CCC DDD)

<PRE>
AAA BBB CCC DDD
EEE FFF
GGG HHH
III JJJ
KKK LLL
</pre>