[KnooL]

pawn Код:

enum pPlayerInfo
{
SpawnedNRG
};

new PlayerInfo[MAX_PLAYERS][pPlayerInfo];

public OnPlayerCommandText(playerid, cmdtext[])
{   
if((strcmp(cmdtext, "/nrg", true) == 0)
{
new Float:X,Float:Y,Float:Z;
GetPlayerPos(playerid,X,Y,Z);
CreateVehicle(nrgid,X,Y,Z,colors etc);
PlayerInfo[player][SpawnedNRG] = 1;
}
if (PlayerInfo[player][SpawnedNRG] == 1)
{
if (IsPlayerInVehicle(playerid))
{
DestroyVehicle(GetPlayerVehicleID(playerid));
}
new Float:X,Float:Y,Float:Z;
GetPlayerPos(playerid,X,Y,Z);
CreateVehicle(nrgid,x,y,z,colors etc);
}
else if(IsPlayerInVehicle(playerid))
{
DestroyVehicle(GetPlayerVehicleID(playerid));
new Float:X,Float:Y,Float:Z;
GetPlayerPos(playerid,X,Y,Z);
CreateVehicle(nrgid,x,y,z,colors etc);
} 
return 1;
}

Haven't tried this out, I believe it works. Tell me if there is something that holds up.