A mission/model can be loaded by selecting File->Load Mission or File->Load Model respectively. A dialog will pop up
asking you to provide the path to the mission/model you want to load.
Examples:
missions\freeride
models\taxi00.4ds
missions\tutorial\scene.4ds
Note that - if you're using the standard config - Mafia Editor prefers the filesystem over *.dta archives, i.e. when a file is to be
opened Mafia Editor will search the *.dta archives only if the file cannot be found in the filesystem.
This behaviour can be changed by setting the entry "ForceDtaFirst" to "1" in the config file. Note that this only works if the data dll
specified by entry "DataDLLPath" has not been patched (like for example by Mafia DataXTractor).
Also note that when specifying a path in any other form than shown in the examples above (e.g. absolute path like C:\Path\To\Mafia\missions\tutorial or
relative path like .\missions\tutorial) Mafia Editor will read from filesystem *only*, even if the path lies in the directory specified by "MafiaPath".