wine winecfg was an example of running a program... it runs winecfg... you dont *have* to run it.... the export WINEPREFIX to wherever you want it is all you have to do before running the Wine command you want to run. You can right simple shell scripts to do this for you... and launch the program you want. If you want WINEPREFIX to always be in 1 other specific place all the time without typing it, you can add the export line to your ~/.bash_profile ... and every time a session starts.. or new terminal window... it will automatically set it for you.
