Can someone help me please ?

I downloaded a file (town) from Blendswap yesterday, In the zip file was the blend file and the textures, I rendered the file and it came up ok with all the textures etc,

I then exported it as a OBJ file so I could open it up in Bryce to create a landscape scene. In the OBJ folder was the Town.OBJ file and Town.mtl.

 

I imported it into Bryce but when I rendered the image it just rendered in the grey default colour.

Why didn't the textures come in?

and how do I get them to come in on the file ?

thanks in advance