Car Strings, Filtering car string WAGs out of activity master Options

[AT RR]

Steve or anyone
I'm in the process of back-dating a template from modern locos to first generation power so I can use the wags and locos the route author used in his origional route. The origional route had car "strings" (to save computer memory usage) that have a .wag extension which was OK when I ran the origional activities that came with the route.

Wanting to use AG and a template I downloaded to generate my own activities I used AM to change out the cars.
When I used AM to replace cars with a like cars AM looked at the "strings" wags as active cars and added approx 35 of them to the running and loose consists. I worked out the problem with con-builder by editing out the "strings".

My question is there a work around using wild cards in AM so I can block these cars or would it be easer to move the wag files for these "string" cars when I exchange the cars and then place them back? I't only around 6 "strings" that are the problem.
The reason I ask as this was for the south bound template for this route and I will be back-dating the north bound template next month.

Thank you all in advance.

Peter