I think you will have to update to get it working, I'm afraid. I don't know the details but I think the emuNAND is using the firm of the underlying sysNAND, which is too old to play those games? I'm sure we're all happy to walk you through it though. Personally it's been such a long time since I've used rxTools that I'm fuzzy on how to get to dev mode but someone else will be able to tell you. Basically you will install sysupdater.cia on your system, put the correct update cias in an updates folder on your SD, boot into dev mode, run sysupdater and update your system. Then you'll put the homebrew starter kit on your SD, run browserhax, install menuhax, then configure menuhax to launch luma on boot - then you can enjoy monster hunter etc and have emuNAND startup on boot.