check_iso_image () {
	local ISODIR=$1
	local MNTDIR=$2
	
	if [ ! -d "$ISODIR" ]; then
		return 1
	fi
	
	if [ -z "$MNTDIR" ]; then
		MNTDIR=/var/log/mount
	fi
	
	SOURCEISO="$(cd "$ISODIR" ; find * -maxdepth 0 -iname '*.iso')"

	if [ -z "$SOURCEISO" ]; then
		return 1
	elif [ "$(echo $SOURCEISO | wc -w)" -eq "1" ]; then
		cat <<- EOF > $TMP/tempmsg
		
		Setup has found an ISO image in the source directory:
		
		$SOURCEISO
		
		Do you want to use this image as an installation source?
		 
		EOF
		dialog \
			--title "USE ISO IMAGE" \
			--yesno "$(cat $TMP/tempmsg)" 11 70
		RET=$?
		SOURCEISO="$ISODIR/$SOURCEISO"
		rm -f $TMP/tempmsg
	else
		cat <<- EOF > $TMP/tempmsg
		
		Setup has found ISO images in the source directory.
		
		Select an image if you want to use it as an installation source?
		 
		EOF
		echo -n 'dialog --title "USE ISO IMAGE" --menu "$(cat $TMP/tempmsg)" 16 70 5 ' > $TMP/tempscript
		echo "$SOURCEISO" | sed 's/$/ "" \\/g' >> $TMP/tempscript
		. $TMP/tempscript 2>$TMP/SeTISO
		RET=$?
		SOURCEISO="$ISODIR/$(cat $TMP/SeTISO)"
		rm -f $TMP/tempmsg $TMP/tempscript $TMP/SeTISO
	fi
	
	if [ $RET -ne 0 ]; then
		return 1
	else
		umount -f $MNTDIR 2>/dev/null
		mkdir -p $MNTDIR 2>/dev/null
		dialog \
		  --infobox "\nMounting ISO image...\n" \
		  5 25
		mount -o loop,ro $SOURCEISO $MNTDIR 2>/dev/null
	fi
}