How to make UNSELF.EXE to see the new key types?

/Original unself.exe source code

static struct keylist *self_load_keys(void)
{
    enum sce_key id;

    switch (app_type) {
        case 1:
            id = KEY_LV0;
            break;
        case 2:
            id = KEY_LV1;
            break;
        case 3:
            id = KEY_LV2;
            break;
        case 4:
            id = KEY_APP;
            break;
        case 5:
            id = KEY_ISO;
            break;
        case 6:
            id = KEY_LDR;
            break;
        default:
            fail("invalid type: %08x", app_type);


/And I would ADD atleast two more "cases" to the list like this

        case 7:
            id = KEY_PKG;
            break;
        case 8:
            id = KEY_DRM;
            break;