I have never used tfs 0.4, but your friend is right.
What distro are you using exactly? Is there a reason to use it instead of a newer one?
Anyway, look through your source folder for a folder named "openssl". Open it and see if there is a file inside called "rsa.h".
You dont need to install anything. If the file is missing, you need to find that file and place it in the correct spot, the compiler will do the rest.
Find a download of tfs 0.4, and see if that file is there. If it is, just copy paste it into YOUR sources in the correct folder.