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Hi all,
Here's a script to install Divine Divinity (GoG release).
The only problem with this program is that it defaults to Direct3D rendering, and this renderer doesn't work too well with Wine. The workaround is to switch to DirectDraw rendering.
Sadly, the setup tool provided with GoG release only allows to switch screen resolution (DirectDraw is no longer officially supported).

Still, it is possible to download the original setup tool from the demo version of Divine Divinity, or from here:
http://www.mediafire.com/?zijaym42nzn
However I'm patching the default setup to enable DirectDraw, so it should not be strictly necessary to start playing.
Enjoy!
https://raw.github.com/petchema/playonlinux/master/divinedivinity-gog

#!/bin/bash
# Date : (2011-12-23 23-13)
# Last revision : (2011-12-23 23-48)
# Wine version used : 1.3.35
# Distribution used to test : Debian Sid (Unstable)
# Author : Pierre Etchemaite petchema@concept-micro.com
# Script licence : GPL v.2
# Program licence : Retail
# Depend :

[ -z "$PLAYONLINUX" ] && exit 0
source "$PLAYONLINUX/lib/sources"

check_install_archive () {
    FILE="$1"
    EXPECTED_NAME="$2"
    EXPECTED_SIZE="$3"
    EXPECTED_MD5="$4"

    POL_SetupWindow_wait "$(eval_gettext 'Checking install archive...')" "$TITLE"
    # Temporarily prevent word splitting
    OLDIFS="$IFS"
    IFS=''
    NAME="$(basename $FILE)"
    SIZE="$(stat -c%s $FILE)"
    MD5="$(POL_MD5_file $FILE)"
    IFS="$OLDIFS"

    if [ $SIZE -ne $EXPECTED_SIZE -o "$MD5" != "$EXPECTED_MD5" ]; then
        POL_Debug_Error "$(eval_gettext 'Install archive mismatch.\\nEither your install archive is corrupted, or is not the expected version.\\nThis script cannot guarantee that installation will work correctly. Please report success or failure to PlayOnLinux forums.')\\n$(eval_gettext 'Name:') $NAME ($(eval_gettext 'expected') $EXPECTED_NAME)\\n$(eval_gettext 'Size:') $SIZE ($(eval_gettext 'expected') $EXPECTED_SIZE)\\n$(eval_gettext 'MD5:') $MD5\\n     ($(eval_gettext 'expected') $EXPECTED_MD5)"
        POL_SetupWindow_question "$(eval_gettext 'Continue?')" "$TITLE"
        [ "$APP_ANSWER" != "TRUE" ] && POL_Debug_Fatal "$(eval_gettext 'Not the expected archive')"
    fi
}


PREFIX="DivineDivinity_gog"
WORKING_WINE_VERSION="1.3.35"

TITLE="$(eval_gettext 'Divine Divinity (GoG release)')"
SHORTCUT_NAME="Divine Divinity"
SHORTCUT_DOC="$SHORTCUT_NAME - $(eval_gettext 'User manual')"
SHORTCUT_README="$SHORTCUT_NAME - $(eval_gettext 'Readme')"

POL_SetupWindow_Init
POL_Debug_Init

POL_SetupWindow_presentation "$TITLE" "Larian Studios" "http://www.gog.com/en/gamecard/divine_divinity" "Pierre Etchemaite" "$PREFIX"

POL_Wine_SelectPrefix "$PREFIX"
POL_Wine_PrefixCreate "$WORKING_WINE_VERSION"

cd $HOME
POL_SetupWindow_browse "$(eval_gettext 'Please select the setup file to run.')" "$TITLE"
ARCHIVE="$APP_ANSWER"

check_install_archive "$ARCHIVE" setup_divine_divinity.exe 1768859354 "560aff548d3df0d619958b443017b111"


POL_SetupWindow_wait "$(eval_gettext 'Please wait while $TITLE is installed.')" "$TITLE"

# Associate .PDF with native app
# http://wiki.winehq.org/FAQ#head-91bf3f0a8ccbfab8dee96f82fae2f1a489e0d243
# Do it before installing the game, so you have the possibility to open
# PDFs with Win32 reader if you choose to install it
cat <<'_EOF_' > "$REPERTOIRE/tmp/pdfnativereader.reg"
[HKEY_CLASSES_ROOT\\.pdf]
@="PDFfile"
"Content Type"="application/pdf"
[HKEY_CLASSES_ROOT\\PDFfile\\Shell\\Open\\command]
@="winebrowser \\"%1\\""
_EOF_
POL_Wine regedit "$REPERTOIRE/tmp/pdfnativereader.reg"
rm "$REPERTOIRE/tmp/pdfnativereader.reg"

POL_Wine start /unix "$ARCHIVE" || POL_Debug_Fatal "$(eval_gettext 'Error while installing archive')"

POL_Wine_WaitExit "$TITLE"

# Default is Direct3D which creates display problems (trails)
# Switch to DirectDraw
cd "$WINEPREFIX/drive_c/$PROGRAMFILES/GOG.com/Divine Divinity" || POL_Debug_Fatal "$(eval_gettext 'Could not find program directory!')"
cp slashed.cfg slashed.cfg.orig
perl -e 'print "\\x02\\x00\\x00\\x00"' > slashed.cfg

# GoG work!
Set_OS winxp

POL_SetupWindow_VMS "8"

## PlayOnMac Section
[ -n "$PLAYONMAC" ] && Set_SoundDriver "alsa"
[ -n "$PLAYONMAC" ] || Set_Managed "Off"
## End Section

# Doesn't hurt ;)
POL_Wine_reboot

POL_Shortcut "div.exe" "$SHORTCUT_NAME"
POL_Shortcut "start.exe" "$SHORTCUT_DOC" "" "'C:/$PROGRAMFILES/GOG.com/Divine Divinity/Manual.pdf'"
POL_Shortcut "start.exe" "$SHORTCUT_README" "" "'C:/$PROGRAMFILES/GOG.com/Divine Divinity/ReadMe.txt'"

POL_SetupWindow_Close

cat <<_EOF_ > "$REPERTOIRE/configurations/configurators/$SHORTCUT_NAME"
#!/bin/bash
[ -z "\\$PLAYONLINUX" ] && exit 0
source "\\$PLAYONLINUX/lib/sources"
export WINEPREFIX="\\$REPERTOIRE/wineprefix/$PREFIX"
export WINEDEBUG=""

POL_LoadVar_PROGRAMFILES

cd "\\$WINEPREFIX/drive_c/\\$PROGRAMFILES/GOG.com/Divine Divinity/" || exit 1

POL_Wine configtool.exe

exit
_EOF_

exit

Edited by petch