Currently it's recommended to have your textures, objects, terrains and other external files be in the same folder as your saved Project (.tgd) files for easy portability. If you do this then you can easily zip up all files and transfer to another computer with no pathing issues. If you instead use "deep" resource paths, for example C:\Documents and Settings\user\my documents\textures\texture.jpg then you will have difficulties loading the file on any other system with a different directory structure.
If you have an archiving program that supports saving paths you can use this function to make it work wherever you move it to, as long as you preserve paths on extract as well. But this will naturally create odd folder structures on the target computer, which is annoying.
We may create a "bundled" project file type that packs all resource files into a single file, but that won't be available for a while if so. Hence the initial recommendation above; although it's a bit annoying to have to copy textures and objects around, it's ultimately the most hassle-free approach at the moment.
- Oshyan