If you want to add more functions in different pickups should use "pickupid" :
[pawn]public OnPickedUp(pickupid, playerid)
{
if (pickupid == 13) { //13 is the "id" of the pickup you should add where are the others ...
//function
}
if (GetPickupModelID(pickupid) == 407 || GetPickupModelID(pickupid) == 406) InfoProp(playerid,pickupid);
return 1;
}[/pawn]