This has bean suggested before. To somehow link a certain fpt to a certan flame. Like write the id or ids of flames where u want the particle to take effect.
For eample if u have 5 flames.
U want 3 wit one texture, 1 with another texture and 1 with yet another texture.
U would need 3 fpts to do this.
On each fpt there would be a place to write the flame id or ids: 1342; 4321; 3241... This would work only with items that u own and are activated