Edit system files MSysIMEXColumns

[Ray]

Does anyone know how to edit the info in the hidden system
files 'MSysIMEXSpecs' and 'MSysIMEXColumns'? I want to
create a spec that i can use every month but one of the
field headers changes depending on the month and year. I
do not want to create the spec manually each month because
I want to do the data extract, crosstab query, and export
all in a macro (for other users who would only interact
with a form)

any ideas?

Ray