I'm just not getting how files and directories are organized, or how to work with other structures. I've read the manual, the documentation and some posts.

What I'm used to is having a base directory, then separate subdirectories for each design file and associated test bench.

I create a project, then try to add the files. The program doesn't seem to allow me to do this as project libraries, only as external libraries, which isn't quite what I want.

If I have an existing Altera project, Sigasi sometimes figures out the structure and does the right thing, but not always. I'm trying to assemble a project outside of Altera using some pre-existing code, and then write some new code from within Sigasi.

I've seen a number of posts that sort of touch on this question, but I am having difficulty grasping what is going on here. It would be helpful to have a more complete description of how things work inside Sigasi, how files are stored, the structure that Sigasi creates when you add files from inside it, and how to work with other file structures. Although it is great that you guys show a lot of screen shots, I think this is somewhere where showing some directory diagrams would be very helpful.

Thank you in advance for your help.