I have drastically changed how Speeder works in an effort to make it as safe as possible. Although the potency of some of the hacks are diminished slightly, everything works almost just as well, and you can now freely disable/enable Speeder whenever you wish. You no longer have to launch Speeder before ESO. This is because I have removed all instances where Speeder modifies the game code, so the integrity check is no longer an issue.
The only real annoyance is if you freeze your Y position (up/down), it does work, but your character will slowly sink back down. Also, Tele-Walk now requires you to jump before you can run into the air, but it seems to work well.
It is imperative that people switch to this new version as soon as possible because ZeniMax has started putting more integrity checks in place, making older versions of Speeder dangerous.
The current, safe version is version 60, which can be downloaded here: