Grog, thanks for clarifications! Indeed, I tried to change 'user' to my normal user id so I would not have to add this before @ when I do ssh but this rendered my NIT unbootable.

Back on my project to change the background based on the time of the day. I've found many nice (environmental) 800x480 backgrounds with potentially can be used for this project. In fact, the page I linked to also contains tags so you can search for backgrounds related to an area (your area? the area where you are?). IMO this type of 'smart' usage of GPS and time is a real killer. Now, I've been able to find a C program which calculates the sunrise and sunset based on long/lat with maths (offline). One could also change this using the GPS, but that might be some thing to do for later. Right now, I would use these with at(1) but this is not included in Maemo so I guess I must use cron which is sub-optimal because I do not know the exact time it will kick in because it differs. I'll also put the script in boot up because the machine might have been down during the time the cron script would kick in.