Updating the turtle programs (wireless)

rednet.open("right")
textutils.slowPrint("Downloading...")
scrap, pName = rednet.receive(60)
scrap, nLine = rednet.receive(1)
if fs.exists(pName) == true then
print("Program name '"..pName.."' in use.")
print("Downlaod cancelled!")
error()
end
local file = fs.open(pName, "a")
local fileData = {}
for i = 0,nLine do
scrap, line = rednet.receive()
table.insert(fileData, line)
end
for t = 0,nLine do
file.writeLine(fileData[t])
end
file.close()
print("Download successful!")
rednet.close("right")

local tArgs = {...}
local pName = tostring(tArgs[1])
local sTime = os.time()
local delay = tonumber(tArgs[2])
if delay == nil then
delay = 0
end
if delay < 0 then
sleep(delay)
end
if #tArgs < 1 or #tArgs > 2 then
print("Usage:")
print("isend <program> <delay>")
print("")
error()
end
local program = tostring(tArgs[1])

rednet.open("back")
rednet.open("front")
rednet.open("top")
rednet.open("bottom")
rednet.open("right")
rednet.open("left")
local program = shell.resolveProgram(program)
print(program)
local file = fs.open(program, "r")
local fileData = {}
local nLine = 0
local nilLine = 0
repeat
table.insert(fileData, line)
line = file.readLine()
nLine = nLine + 1
if line == nil then
  nilLine = nilLine + 1
end
if line ~= nil then
  nilLine = 0
end
until nilLine == 2
file.close()
pName = tostring(pName)
nLine = tostring(nLine)
rednet.broadcast(pName)
rednet.broadcast(nLine)
nLine = tonumber(nLine)
for i = 0,nLine do
if fileData[i] == nil then
  rednet.broadcast(" ")
else
  rednet.broadcast(fileData[i])
end
end
local eTime = os.time()
tTime = eTime - sTime
print("Time elapsed: ".. tTime*50 .." seconds.")
rednet.close("top")
rednet.close("bottom")
rednet.close("left")
rednet.close("right")
rednet.close("front")
rednet.close("back")