Install msi with msiexec in a Specific Directory

Use TARGETDIR instead of INSTALLDIR. Note that the quote marks for TARGETDIR property are only around the path in the case of spaces.

msiexec /i "msi path" TARGETDIR="C:\myfolder" /qb

InstallShield 12

INSTALLDIR represents the main product installation directory for a regular Windows Installer–based (or InstallScript MSI) installation, such as the end user launching Setup.exe or your .msi database.

TARGETDIR represents the installation directory for an InstallScript installation, or for an administrative Windows Installer based installation (when the user runs Setup.exe or MsiExec.exe with the /a command-line switch).

In an InstallScript MSI project, the InstallScript variable MSI_TARGETDIR stores the target of an administrative installation.

Source: INSTALLDIR vs. TARGETDIR

Use INSTALLLOCATION. When you have problems, use the /lv log.txt to dump verbose logs. The logs would tell you if there is a property change that would override your own options. If you already installed the product, then a second run might just update it without changing the install location. You will have to uninstall first (use the /x option).