Is there a way to perfectly emulate manual downloads?

[makasenai]

By this I mean that if I manually download a gallery picture by picture I will not care about "peak hours" or a gallery being "too old". I might need to wait forever for every pic to load but eventually I will be able to download the whole gallery (in its original form instead of resized). Is there a way to tell the script to emulate this and be patient instead of asking for GP every time I try to download something?