One thing I've done is after I install products to the appropriate runtime (I use the Downloads Runtime for basic products, have a V3 Runtime, and a Reorg Runtime where everything will eventually go), I move the textures to the P4 Runtime since I don't have enough room on the drive where P5 is installed. The reason I do this is that P5 has a problem with textures with the same name but in a different Runtime. For example, when loading the black.jpg texture for the MilCat, I had installed the MilCat to the downloads folder. Well, P5 looks in the P5 Runtime first and since it didn't find the required folder, it kept looking through the rest of the folders until it found a black.jpg even though it was for a temple or something. It never got to the Downloads Runtime. So, by putting all my textures in one Runtime, P5 will find the correct folder every time.