Fan-made storylines often attempt to create a "prequel" or "sequel" atmosphere similar to the official Stories games. A prominent version from the GTA Fanon Wiki features:
Talented modders have attempted to "port" the experience to the PSP or create new prequels using existing engines. gta san andreas stories psp iso
Happy hunting, and remember: In the world of fan-made Stories ISOs, you only see the failed missions—but the spirit of Grove Street lives on in your PSP’s memory stick. Fan-made storylines often attempt to create a "prequel"