Most 240x320 touchscreen phones from this era do not "install" MRP files like modern apps. Instead, they require a specific folder structure on your memory card:

Create a folder named mythroad (or sometimes mulgame or downdata/mr ) on your SD card root.

Because 240x320 is a standard "QVGA" resolution, these games fit perfectly without stretching or pixelation. For touchscreen devices, arcade and puzzle genres often perform best due to simpler input requirements.