Ok so im one of the few who downloaded the new LH Song. Things is people dont know how to make it work.
You need to edit the song name to something likes.. lasthumanrnd or something then rename the lasthuman song name in the zs_options.lua
As for the Whole Boost that f*cks up..
Why not make it give you 100 Armor?
When you switch to a new weapon, Each weapons has its own LUA Setting of Speed.
It simply nends to make it so that doesnt matter when the Last Human Script Starts. Try editing the LH Script to make it so.
Or as Alkaline said make the speedbost happen every 5 seconds or so...