B*gg*er! I just got to the end of typing a reply, then lost 'net connection!
Anyway, yes, this is a good enough section to post the question, and it seems two of your other queries have been sorted.
Regarding the re-sizing of pics, use a photo-editing programmes, such as Irfanview. This can be downloaded free.
Go to 'File', selct the required pic from your files, by clicking 'Open' and selecting the file/pic.Then click on 'Image', then 'Re-size/re-sample'. Enter a size required in the first dimensions box (ideal is 800 x 600 pixels), accept this. The system will automaticaly adjust the other dimension accordingly. Then click 'File', click 'Save'. A box will open, click to save, and do the same on the second box which appears. Job done!
'Bombing up', or the loading of bombs, could take some time, especially if there were last-minute changes to the target or load requirement. In Autumn or Winter in the UK, it was dark, or almost, by around 15:30 hrs, allowing for the time system in place then. There was a total black-out in place during WW2, and towns and cities used every aid possible to help with getting around at night. For example, the curbstones of pavements, mainly at road junctions, bends in the roads etc, were painted white, to help them being seen, by drivers and pedestrians. Most vehicles had the edges of their mudguards/wings (fender in the US?) painted with a white stripe, around the curve, for similar reasons, as did the lower section of the rear mudguard on bicycles. This was even more important on the bleak, pitch black airfields of Bomber Command, so it would make sense, if this was one of the reasons, to paint the large, 'soli'd main gear of the Halifax. This was more in shadow, under the big wing and deep, slab-sided fuselage, than on the Lanc, and taller, so it was very posible that vehicles, or personnel, could run into it if was black. Of course, not all sqaudrons seem to have adopted this practice, and the main reason was more probably to do with identification (on the ground) of which individual aircraft was which, or from which Flight.