Silhouette Stories PS1 PAK files

[AFruitaday!]

I sadly tried using PAK decompressor programs to look into the files but neither of them work. By the way, speaking of CD graphics, why do the gfx in the decompressed file in every CD game look like this below in the left? Is there any easier way to get rid of the line and space? Been using a hex editor to get rid of it. Compare the left and right images (left is extracted from the bin file and the right is from JPSX tim file)