I am currently looking into creating a Miria/Davin level-up MOD in which both characters can level up 5 (maybe 6) times. I know that I will need new pids for each level of Miria and Davin. I know how the 'pid formula' of party.txt works. Here are a few things I DON'T know: 1. There are around 520-560 different *.pro files in the critters directory, each numbered consecutively from 00000001.pro to 000005xx.pro (I forget exactly how many *.pro files). If I choose to set the pids for Miria and Davin's levelled up characters from 600-611, inclusive, will the game have problems recognizing the new pids because 00000599.pro and 00000581.pro do not exist? 2. Where in master.dat are the picture files for critters such as the Hero, a lesser radscorpion, a lesser deathclaw, an Enclave trooper, etc.? 3. How would I tell the game to identify a certain pid with a certain image file? 4. I'd like to allow Davin to use really big guns like the Bozar, Miniguns, and Rocket Launcher, but only after he has levelled up at least 4 times (Davin should not be able to whip out a Minigun as soon as the player marries him). Is this possible?