Thorn
Not sure if you mean this but I guess you want to add matchframes. Go to your replay folder right click the file and open it with notepad.
You will find
#!/usr/bin/toribash
#made with toribash-3.8
#SCORE 17146 -13051
#WIN 0 RayA75
VERSION 10
FIGHTNAME 0; Awesome L.elbow dm1 + dc redone1
BOUT 0; RayA75
BOUT 1; uke
AUTHOR 0; RayA75
NEWGAME 0;500 10 0 0 0 2 100 0 0 classic 0 0 100 0 0 0 1 0 2 0 0 0 0 0 0 0.000000 0.000000 -9.820000 0 0
Edit the bold value to what matchframes you'd like to have. Save it and open it with Toribash.
Thorn