Hello,
I was searching for the CTR for the Rock'n'rollercoaster(Gadgets CTR). I found it already.

I have finished the track with a Looping Rollercoaster, and the ctr that I have uses a corkscrew(CTR_Vekoma) for the track.

Is there any way how I can convert the Looping coaster to the CTR_Vekoma track, or to add the car to the Looping RC track I already made?

I hope someone can help me. I have already tried to rename it but it didnt work.

bramb76

open the looping coaster in sandbox mode.
delete the station and replace it with a CTR_Vekoma station
delete little sections (like the lift hill or double corkscrews, or just as many you can remember) and rebuild it with the CTR_Vekoma ride.
do this untill the whole roller coaster is retracked as the CTR_Vekoma ride type, and save it. then you have the same exact track as the other, but with CTR_Vekoma.

I do this when i replace a roller coaster with a ctr.

Thanks for your answer, but in the Looping RC I used a quarter looping, and with the CTR_Vekoma you can't make that.
How can I fix this problem?

uhhh... you can't.