I've have HiToText and my hiscore compiled version of mame .141 working in Hyperspin with some snafus.
1.) Even though I've removed the "Hotkey, %exitEmulatorKey%, CloseProcess" line from mame in Hyperlaunch it still doesn't work with Hyperlaunch enabled. It works perfectly with Hyperlaunch off or running mame from a command line. With Hyperlaunch enabled it doesn't write the .hi files.
2.) HiToText works though the scores aren't immediately updated when I exit a game. I have to open another game and then return to the previous games page for the scores to be updated.