Madtropolis on Lothor's Ship
Here's the Power Drainer/Capturer
More new footage of Madtropolis
Madtropolis on Computer Monitor  
Looks like the scenes of Madtropolis as seen on Cam's Computer Monitor all come from
Hurricanger 22.
The up-close shot of the lit fuse going also comes from Episode 22.
Back to new footage
 
Back to Sentai
These shots  are back to new footage.
This is when it goes back to Sentai footage

Back to new
New footage of Red's Laser Blaster
Back to Sentai
New footage of a draining Blue Ranger
Back to Sentai
Once you see the usual stock shot of the unopened Scroll opening on Scroll and doing its resurrection and enlargement business as per usual then that is when it's just Sentai stock.
After a flash of light, there's new footage of Giant Madtropolis.
Here's some new footage of the Giant Madtropolis
 

Once you see the zords then that is when it goes back to Sentai footage.
Back to new
Once you see the zords then that is when it goes back to Sentai footage.
Back to new
The next shot of Giant Madtropolis is when it goes back to Sentai footage.
Scroll of Time 
The scene in which Giant Madtropolis is being frozen is new footage.
All footage of a frozen Giant Madtropolis is new footage.