Oasis montaj is by default installed as "Geosoft Desktop" in the "Program files" folder of your "C:" drive. Certain files required to support 32-bit interoperability may be installed in the "Geosoft Desktop" folder of "Program Files (x86)", but these can be disregarded for developers who intend to extend Oasis montaj or create stand-alone 64-bit programs.

All program files that configure and control the look and behaviour of Oasis montaj are organized into subfolders. The .../user/ subfolder is reserved for user files and user customizations and has the same structure as the main folders. For example, Geosoft menu files are stored in .../omn/, and any customized menu files you create must be stored in .../user/omn/.

The following table describes the content of each of the Geosoft folders.

Folder	Description
`.../bar`	Geosoft toolbar description files (.geobar)
`.../bin/`	Geosoft binary executable files and DLLs
`.../csv/`	Named parameter tables, such as coordinate system parameters, parameters used in templates, etc.
`.../csv_aliases/`	Named parameter aliases that are used to remap certain names to the name used in a named parameter table.
`.../data/`	Sample data sets.
`.../etc/`	Miscellaneous reference files
`.../fonts/`	Geosoft format vector font files
`.../ger/`	Error message files
`.../gs/`	Scripts, many called from omn files.
`.../gx/`	Geosoft Language compile GXs
`.../hlp/`	Help files
`.../img/`	Images, toolbars and icons
`.../ini/`	Initialization files, mostly dealing with mapping names to files.
`.../maptemplate/`	Map templates for standard Geosoft maps.
`.../omn`	Geosoft menu description files (.omn and .smn)
`.../pages/`	XML files to support DAP data management functions
`.../schema/`	XML schemas
`.../spec/`	Geosoft "special" customization
`.../stylesheets/`	metadata style sheets
`.../tbl/`	colour tables
`.../temp/`	Geosoft temporary folder. This location can be changed on installation or by the user settings.
`.../user/...`	User versions of the above folders. Any customizations should be placed in appropriate sub-folders. For example, a custom `.omn` file should be placed in `.../user/omn/`.

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