If you have cid52 so the only way to mod something is davinci custpack. It's not free, so THINK if you need it. There are some patches for K790, but I don't know about W610. Anyway patching costs 20 euro. (Maybe cheaper)
And about FW. In new firmwares bugs are usually fixed so if you think your FW is old just update it using SEUS or FOTA.