If you're lucky (he, he)
the distributor will have their source code in this format. There is a script called "configure" or something along those lines. It checks everything there is to know about your computer and if you have needed dependencies and if you have the proper C compiler. (In slackware you're probably going to want to go to wxwidgets.org and download the source for this compiler thing. A lot of programs I've tried need it.)
Type "./configure" or "sh configure" stuff will happen
after this is finished, type "make" This will probably take the longest (quite awhile)
then type "make install" (more stuff happening)
Now in any Konsole or terminal you should be able to type the name of the program or something to get it to work for example. "gaim" or "cedega [name of .exe]" will run stuff in the terminal.
Sometimes there are different install scripts with other names like "install.sh" . Guess what.
type "sh install.sh" or whatever it may be. You're gonna have to look around to find the right install scripts before you try compiling.
Still other times there are a series of directories that you may recognize. (i.e. usr, etc, lib)
You need to copy all of these files in the .tgz or whatever into the corresponding directories on your system. if the program is say ganim8, inside the ganim8 tgz is "/ganimate/usr/lib"
You need to copy the files in the previously mentioned folder into your system's "file/usr/lib"
This is how you do it foe all directories
Other source codes make you run python or java scripts, (i.e. .py, .jar) I don't lnow how to run these, but you can look it up. If this is confusing keep asking and google searching until you get it. Once you do get it, it is the funnest (yes funnest) thing you will ever do in linux. This is what makes you a Slackware user, you refuse to use buggy precompiled packages!(1.e. debian, fedora, suse, mandrake)
I'm tired of typing, go ahead and ask questions,