If you want to retain your (2) announcements, and instead, make a separate route file for the (5) (so you'll basically have two route files, the (2) via 7th and the (5) via 7th) you can change the coding in the announcements. This requires extra work, but at least you won't have to continue to revert back and forth the announcements.
Here are the steps:
Make a new folder called '5via7th' (or any other title deemed appropriate) and place all of your announcements in that folder making sure you give unique names to the arriving and departing announcements. For example, 34_arr and 34_dep and do that for ALL your announcements. Drag that folder into your SOUND folder in whatever is your sound directory.
Next, copy and paste the 2's route file, should be in .csv format and rename it 5 via 2 or any title that you want to adapt. Open that sound file and using notepad (or wordpad's search feature), type in the word ".wav" (MAKING SURE THE PERIOD IS IN FRONT OF THE 'WAV').
The first line that Notepad should take you is this :
1500,.sta Flatbush Avenue;7.2930;7.3000;0;1;0;0;;20;45;\2\flatbushl.wav,
Now assuming that you have your 5via7th folder in place (or whatever you choose to name your folder), and the flatbush announcement (lets say is named 'Flatbush_dep', you would recode the line to this:
1500,.sta Flatbush Avenue;7.2930;7.3000;0;1;0;0;;20;45;\
5via7th\
Flatbush_dep.wav,
Now when you leave flatbush, the 5 announcement will play instead.
____________
NOTE: YOU NEED TO DO THIS TO ALL OF THE ANNOUNCEMENTS, WHICH IS A TEDIOUS AND TIRING PROCESS. This is why this is only recommended if you want to retain your (2) and have a (5)via 7th avenue.
Here are some more example codings:
2175,.sta Newkirk Avenue;;;0;1;0;0;;20;45;\2\Newkirkl.wav,
TO
2175,.sta Newkirk Avenue;;;0;1;0;0;;20;45;\
5via7th\
Newkirk_dep.wav,
2250,.form 0;r;1;0,.form 1;l;1;0,.freeobj 0;254;5;0;0,.announce \2\Newkirke.wav,.pitch 0,.railstart 10;14;0;0,.railstart 11;-18;0;0,.freeobj 0;42;9.5;0;0,.freeobj 1;41;-9.5;0;0,.form 10;l;1;0,.form 11;r;1;0,.freeobj 0;2;2.9;0;0,.freeobj 1;2;-2.9;0;0,
TO
2250,.form 0;r;1;0,.form 1;l;1;0,.freeobj 0;254;5;0;0,.announce \
5via7th\
Newkirk_arr.wav,.pitch 0,.railstart 10;14;0;0,.railstart 11;-18;0;0,.freeobj 0;42;9.5;0;0,.freeobj 1;41;-9.5;0;0,.form 10;l;1;0,.form 11;r;1;0,.freeobj 0;2;2.9;0;0,.freeobj 1;2;-2.9;0;0,
2650,.sta Beverly Road;;;0;1;0;0;;20;45;\2\beverlyl.wav,
TO
2650,.sta Beverly Road;;;0;1;0;0;;20;45;\
5via7th\
Beverly_dep.wav,
Be advised that the departing line usually comes before the arriving line.
Hoped I helped.