Frax footage with him walking down the stairs and grabbing the Trizirium Crystal and inserting it comes from Ep 47.
Once you see the Silver Guardian SUV (but just the outside of it so that you can't see who is within it) then that is also Sentai footage.
When Jen contacts Wes to let him know there's trouble at the Industrial Center, the following shot with civilians in front of a fiery explosion is when it goes back to Sentai footage.
This shot is when it goes back to new footage
This shot of Frax is Sentai footage howver it comes from Ep 42.
Frax fires his Finger Blast in Sentai footage however it then cuts to the new footage of the Rangers getting blasted by it.
The following shot of Frax in which he says the attack isn't a mutant, it's a robot appears to be new footage.
Once you see the Red Ranger in the air then that is when it definitely goes back to Sentai footage.
Once you see Maxas then it's back to the Sentai footage that comes from Ep 47.
Once you see the shot of Frax's feet then that is when it goes back to Timeranger 42 footage.
Once you see the feet and legs of Quantum then that is when it goes back to Timeranger 47 footage.
The Giant battle between Maxax and the Q-Rex Megazord is also 47 footage.
Once it cuts back to Frax then it goes back to 42 footage.
It then cuts back to the Giant battle which comes from 47 footage.
After Maxax's destruction, it then cuts to what appears to be new footage of Frax.
This shot is definitely when it goes back to Sentai footage which comes from Ep 42.

Frax-Lab footage and Maxax footage comes from Time Episode 47
Frax vs Rangers battle footage comes from Time Episode 42