This zDoom Launcher is for quick launching of zDoom with all it's addons available. It allows configuration files to be made for each game and run. It also allows additional parameters to be passed at runtime. It provides a drop down and automatically detects a configuration file when it's added to the directory. There's a manual that comes with it. It's open ended enough to be used as a generic program launcher as well.
The link is for the .zip without the vb6 runtime files. You only need to extract it into it's own directory and run it. It comes with a bunch of config files as examples and to s how how it works. This version is the first release on CNET Download.com.