Hi! Well, finally, I decided not to use it. I'll explain why:
Using this record/playback feature allows me to make the movements in the cutscene for the character that the player uses, but it limits me in certain aspects. The player can move the character around, etc. But some animations are not available to the player by pressing the buttons. So, for example, when the character dies, he is tranformed in a cloud of bats. But I also want the character to move around (although not available to the player) in this bat form. So I can't record inputs to accomplish that.
Also, I cannot use this to move around NPCs, like enemies and friends that are not controlled by the player. I don't know if you remember, but my character is sort of split in a couple sprites: a hit-zone (invisible, contains most of the code for the player), the character (visible, contains animation but no code), etc. So, when I switch to a cut scene, I freeze the hitzone, so the player cannot interact, and I make the character move around, play his animations, etc. When the cutscene ends, I am sure to resume the game at the right position, since the hitzone that dictates everything hasn't moved at all. The character is moved by to the hitzone location and everything is well.
The only thing that makes it tedious, is that I cannot record what I want to happen, so I have to figure it out frame by frame. But, since I don't plan making some very difficult cutscenes, I guess I'll be okay.
I'm very sorry if I had you work on this for nothing...

Anyway, I'm sure it will be a great addition to SGDK2, I will probably use it in my future projects, or even in this one later on.
I hope you're not too mad at me...

Thanks for your time bluemonkmn! I really appreciate it.
