Final Fantasy Hacktics

Hey guys. So I'm just starting out with modding FFT and I've downloaded a few of the sprites from this site just to get my hands dirty with Shishi, Graphics Gale, etc. However, with all of the .bmp and .spr character spreads that I downloaded, all of the portraits look more like the negative of a photo rather than their correct palette. Has anyone else run into this issue? Any help would be appreciated. Thanks in advance.

Hey guys! So, lately I've been delving into learning Unreal Engine and am interested in game development and such. However, I also would like to get into modding. I'm a pretty dedicated individual and I have plenty of self discipline and motivation, however, I was curious if any of the modding veterans around this site had a list of the most up to date modding tools used for FFT (both PSX and PSP are fine, I'd like to get my hands dirty with both eventually) and also a list of information/tutorials on how to use said tools. I've been watching this site for years and played most of the mods at least once. Jot5 and Celida's are a couple of my favorites (Thanks guys! Your work is part of what's motivating me to make this post!) and I'd like to eventually make something like that of my own. So, if there's any way any of you guys could point me in the right direction, I'm pretty eager to start learning and potentially helping or making my own mod in the near future. Thanks in advance!