On your incoming DDI route i.e. the route your store numbers will be diverted to. Set DNIS to YES in the RDB on the Meridian.
IDC the DNIS numbers that will be used for the stores to a CDN and acquire the CDN, One CDN will do for all DNIS numbers.
In the Master script, route on DNIS e.g
WHERE DNIS EQUALS
VALUE (DNIS NUMBER usually last for digits of DDI): EXECUTE SCRIPT xxxxx
VALUE: etc, etc
END WHERE
On the CCMA DNIS configuration enter the DNIS numbers and include the store name in the name field.
Change the Phoneset display properties to display the DNIS name.
Bish, bash, bosh, the jobs a good'n
Hope this helps, this may not be a comprehensive list of all the necessary tasks, just a guide.