Given some of the comments so far here and on steam, how about a simplified tutorial that skips the manual TFW option and could even skip the coastline/water masking for mainly inland areas - or link to it as n optional extra. Also i found i can navigate around the world in FSET without needing co-ords, just by drag and zoom, so skip that bit too. Then its just a case of
1. Install SDK
2. Install FSET and latest ini
3. Download Geoconvert
4. Run FSET, set output directory and other config, find the area you want and download it
5. Run geoconvert