So where to begin? You will have to compile your own version. Not only will you need to get the 0.133 files, you'll also need the HI for 0.133 (each version is different according to build). You will not lose any of your current settings since you're generally using the same thing with a few added lines of code. You can update your rom set after you do the compile, I think you'll have to to add in the hi score functionality. If I could make a recommendation, use Headkaze's MAME Compiler which pretty much automates the whole thing. If you need any more help feel free to ask. There's a bunch of us that compile our own MAME versions.