Hi JSmith,
Just a couple of Anim8or basics which, hopefully, may be of some help.
Have you configured where your textures are through Anim8or, so it points Anim8or in the right direction when looking for textures, objects, etc.
If not, go 'file -> configure', and you'll see what i mean. You'll need to make some new folders, named 'Projects', 'Textures', Import', 'images' and 'Scripts'.
Put these new folders into a main folder called 'Anim8or'
So now, for example, the textures are at 'C\Anim8or\textures.
Can also be a good idea to keep relevant textures in the 'project folder' inside the projects folder. ie: C\Anim80r\projects\SlimJim. (so, your textures will be in a folder called 'eg: SlimJim, which will be in the folder 'projects.
When Anim8or opens a project, eg: 'SlimJim', it first searches where the textures are configured to be. ie: C\Anim8or\textures. If it can't see them in there, it will search the project folder. ie: C\Anim8or\projects\SlimJim.
(i think from memory thats the order which Anim8oe searches. It may be the other way around, but no difference really, it will find them if they are in either folder.
If you send your project to a friend, the textures will need to be in the folder as well, along with the An8 file.
Thats all i can think of at the moment. As far as being able to see the textures in the file that your friend sent you, the answer is either A) you already have the 'images/textures on your machine, or B) They're not actually images, but materials made in the material bar. (or possibly corrupt images, but not so likely)
anim8or can't open texture file:" pop-up windows.
usually means Anim8or can't find the texture/(image) file
As far as 'black' goes, sorry, can't think of anything at the mo.
Does any of this help. ?
EDIT: possibly has something to do with being .3ds. ?, rather than .an8. In which case, i've probably just said a whole lot of stuff that you already knew, without actually being any xtra help. lol. sorry if so....