There is a little bit of information which might help you in your task.
First you may need to download FWTools inorder to use geotifcp and listgeo.
Create a TIFF File(You already did it..) Let us call it
find the image width and height(from where you saved it).
imageWidth = 1016
imageHeight = 551
Create a World File for our initialtif.tif using the below parameters.
From Wiki, the World File is defined as below. Refer below image for details. mapWidth and mapHeight are to be measured from your map application.
Line 1: A: pixel size in the x-direction in map units/pixel = mapWidth/imageWidth
Line 2: D: rotation about y-axis = 0
Line 3: B: rotation about x-axis = 0
Line 4: E: pixel size in the y-direction in map units, almost always negative = -mapHeight/imageHeight
Line 5: C: x-coordinate of the center of the upper left pixel = C
Line 6: F: y-coordinate of the center of the upper left pixel = F
Enter these 6 numbers on a text file and save as
Get a GeoTiff(say reference.tif) in the same Coordinate System/projection. Get one from your friends or create it yourself using Qgis/Arcgis..
extract metadata from GeoTiff using
listgeo command(In Windows..)
listgeo -proj4 reference.tif >metadata.txt
Create GeoTiff using
geotifcp -g metadata.txt -e forWorld.TFwx forWorld.TIF finaltiff.tif