I hope the US version runs on 1964... the European version says 'not working' under comments . NEways, if it's just speed, it won't matter - pj64 runs at 60 fps for me. If it fixes the crashes, that's great!
it shouldnt say 'not playable'. u either hav an old version, or an old ini, or both. make sure u have 19220.127.116.11 . plus the newest .ini file (u can get from www.ngemu.com or theres a thread on the 1964 official forum at www.emutalk.net ) .