Be a little more patient; it had only been 3 hours.
From what you posted std are images and there are at least 2 different types from those samples.
SAF appears to be animation or something like that.
For time sake I only created a generator for the easier of the two types, but it can convert both types to PNG.
Download
You can drag .std or .png files on it to open them.
You can then export as PNG or STD.
Of course, I haven't actually tested this in-game, so unsure if it will actually run correctly.
Edit:
Oh, and the images can only have 256 colors. If is has any more then the image will look really gross when it's converted.
From what you posted std are images and there are at least 2 different types from those samples.
SAF appears to be animation or something like that.
For time sake I only created a generator for the easier of the two types, but it can convert both types to PNG.
Download
You can drag .std or .png files on it to open them.
You can then export as PNG or STD.
Of course, I haven't actually tested this in-game, so unsure if it will actually run correctly.
Edit:
Oh, and the images can only have 256 colors. If is has any more then the image will look really gross when it's converted.