RPG Maker would be easiest.. I thought you were talking about a Chrono Trigger mod, but yeah RPG Maker would be much easier to do..
Hmm I have some ideas boiling right now!
Sign on MSN sometime!
Is RPG Maker for PSP and is it free?
No and kind of. We're talking about RPG Maker 2000/20003 here (just to note, because "RPG Maker" was released for PlayStation). Technically, RPG Maker 2000/2003 are pirated (no English version other than the translation).. but at this point it seems borderline freware because no one at Agetec (the publishing company) seems to even give a shit anymore.
Basically.. RPG Maker 2000/2003 are illegal to download or share, but I'm 99% sure that anything you create with them is ok to share, in case anyone's worried about that I thought it best to clear that up.