im not sure if this is what u want, but u can do this:
set the shop
push button for macro (F1, F2, F3, etc.)
the macro would be smth like this:
+WTS x,y,z
/delay 60
+WTS x,y,z
/delay 60
+WTS x,y,z
/delay 60
+WTS x,y,z
/delay 60
+WTS x,y,z
but as u know macros have limited space, but u can do a link to another macro:
/useshortcut 4 1 for exemple (drag the shortcut not to mess it up)
and the second macro would be like the first, and if u want u can make another link to another macro, and so on...this way u can shout for hours without having to press anything.
If this is not what u want, and u want a way to automaticaly set shop (for exemple with soulshots), stop shop, craft more soulshots, make shop again, and keep shouting...theres no macro for it
but u can use this
-> http://www.google.com/search?hl=pt-BR&rlz=1T4GGIC_pt-BRPT207PT207&q=l2walker+download&meta=