Hello, you have to switch wine architecture from 64bit to 32bit. In first you have to have installed 32bit binary of wine. Before installation of wine use command: dpkg --add-architecture i386, for allowing install 32bit binaries on 64bit system. Install wine.
Next step for install 32bit programs is using of command: WINEARCH=win32 WINEPREFIX=/home/user/.something wineboot (don't use .wine, use somethings like .wine32)
(WINEARCH wil switch the architecture, WINEPREFIX is folder with installed programs,(.wine is default WINEPREFIX and using 64bit binaries),
Note: Default wine architecture is still 64bit, but you can switch to another architecture with WINEARCH,, and you will have to do this every time you will install 32bit program.
Next step is command for install MT4 or 5 to your new WINEPREFIX. Use command: WINEPREFIX=/home/user/.somethings wine start /unix way/to/mtsetup.exe
(this command will tell to wine: use that wineprefix at first and install program in to that.
Note: Default wine architecture is still 64bit, but you can switch between 64bit and 32bit..