[Konstantinos]

I will agree with System64 because it has many variables and I have already a lot.
You have a undefined symbol

pawn Code:

new sdisplay[MAX_PLAYERS]

Also, why do you use the variable like this?

pawn Code:

s3[MAX_PLAYERS];
// ---
format(s3[playerid],256,"%i MPH", s2[playerid]);

1024 bytes for this text only? Waste of memory.
An array of 32 is enough.
Although, you explained it good.