Here's some additional tips: Don't bother with the .3ds file, it never mattered. Keep it, delete it, hang it on the refrigerator. If your entities in Classic already have the texture in the same folder as the entity itself(as many do), just copy the whole folder directly over to the entity folder in Reloaded (convert to .dds as necessary, although .pngs and .jpgs still seem to work fine, just rename all as mentioned above and beware of what may happen in the future!!). It will work fine at this point in time (as of beta 1.006). You can make the normal and specular maps if you wish for these items, but from a functionality standpoint, they are not necessary. Don't worry about the appear/disappear/default fpis in the fpe yet, but also beware that they may have an impact in further revisions of the engine and will have to use Lua scripts instead.
MAME Cab PC: i7 4770@3.4Ghz (passmark 9945), 12GB RAM, Win 8.1/64, GeForce GTX645 (passmark 1898); Shiny new laptop: i7 4800MQ@2.7Ghz (passmark 8586), 16GB RAM, Win 8.1/64, GeForce GTX870M (passmark 3598); Old laptop: i5@2.3Ghz, 8GB RAM, Win 7/64, Intel 3000 graphics