The SRW games have two save lists which have different lengths. Carrying the ID from one to the other causes the out-of-range problems and breaks them.
On a real PSP the system save list dialog always move your cursor to the latest save automatically, which nullifies that problem without effort.
I don't know what @Xele02 's comments were. Is there a game that autosaves on a previously select-loaded save (so it might not have been the latest) without updating its timestamp beforehand?