OMG I just did it and it work! I was able to repack in FitGirl-style game(Raiders of the Broken Planet) by repacking its resource files. But! Not only simple quickbms command with default script like everybody else can do, I had to modify it for reimporting because memory mapped import doesnt work on that game. So I ended up learning about BMS scripting language, headers/flags, compression etc. You know for a n00b like me this was quite achievement, so glad... and finally can actually have a sleep.
Big thanks PrinceGupta2000 for hinting on zeroing data pack capability of quickbms, that was the trigger
.
PS(For those curious how I was able to put " compressed blocksized" pack back together, simple, I used normal "clog" without fragmenting through memory mapped "append" command. I expected it
not to work and was ready to modify header flags but alas, it wasnt necessary. Game use lz4 btw(ztool wont work), original script for extract is castlevania.bms)