long story short, I use the following as /usr/bin/wine-auto: #!/usr/bin/env bash x64=`file $1 | grep "x86-64" | wc -l` if [ $x64 == 0 ]; then export WINEPREFIX=$HOME/.wine32 exec wine32 "$@" else export WINEPREFIX=$HOME/.wine64 exec wine64 "$@" fi
it assumes that 64bit wine is in ~/.wine64 and 32bit wine is in ~/.wine32 -- Marius