Porting a project in Quartus

The easiest way to do this is the with the Quartus Archive tool. Open the project on his machine, generate a quartus archive file, then carry that file to your machine and open it.

Also, there is nothing preventing you from just copying his directory and putting it on your machine but you might get a bunch of autogenerated files you don't need.

If you know what files he uses in his design you can just copy those files along with the .qpf (quartus project file) and the .qsf (quartus settings file).