Back up tiff archive to jpeg, in mirrored folder struckture

Hi I use windows explorer as my photo archive, saving my images in folders in a "tree structure" on F:\archive. I have both tif files and jpeg files in the archive. What I would like to do is to make a copy of the F:\archive, with its structure/subfolders including the files to D:\backup. Every time a new file is added to F:\archive it will be copied to D:\backup in the correct subfolder. The files copied to D:\backup needs to be converted to jpeg. In other words, D:\backup will be a backup to jpeg of the F:\archive. When a file is deleted in F:\archive it does NOT need to be deleted in D:\backup. Since F:\archive both contains tiffs and jpegs it can happen that there are two different files called [login to view URL] and called [login to view URL] in the same folder. Since the [login to view URL] will be converted to a jpg and [login to view URL] will keep its name, there will be two [login to view URL] files in D:\backup. There needs to be a solution on how to rename when two files will get the same name in D:\backup. Ex. [login to view URL] and air_2.jpg. The script needs to handle tif, tiff, jpg and jpeg. I also need a step by step installation guide. Please make a proposal on price. Regards Hakon