I have the following in the file.
ECHO emoticonPack=Default >> %SPARKPREFS%
ECHO idleTime=3 >> %SPARKPREFS%
ECHO idleOn=true >> %SPARKPREFS%
ECHO password= >> %SPARKPREFS%
ECHO timeDisplayed=true >> %SPARKPREFS%
ECHO offlineGroupVisible=true >> %SPARKPREFS%
ECHO notifyOnOnline=false >> %SPARKPREFS%
ECHO contactListFontSize=11 >> %SPARKPREFS%
ECHO lastUpdateCheck=1187293686312 >> %SPARKPREFS%
ECHO username=%USERNAME% >> %SPARKPREFS%
ECHO windowTakesFocus=false >> %SPARKPREFS%
ECHO toasterPopup=false >> %SPARKPREFS%
ECHO xmppPort=5222 >> %SPARKPREFS%
ECHO timeout=10 >> %SPARKPREFS%
ECHO autoLoginEnabled=false >> %SPARKPREFS%
ECHO showHistory=true >> %SPARKPREFS%
ECHO checkForBeta=false >> %SPARKPREFS%
ECHO showEmptyGroups=false >> %SPARKPREFS%
ECHO tabsOnTop=true >> %SPARKPREFS%
ECHO chatRoomFontSize=12 >> %SPARKPREFS%
ECHO startOnStartup=true >> %SPARKPREFS%
ECHO notifyOnOffline=false >> %SPARKPREFS%
ECHO server=im.brazos.org >> %SPARKPREFS%
ECHO chatNotificationOn=true >> %SPARKPREFS%
ECHO startHidden=false >> %SPARKPREFS%
ECHO passwordSaved=false >> %SPARKPREFS%
ECHO buzzEnabled=true >> %SPARKPREFS%
ECHO emoticonsEnabled=true >> %SPARKPREFS%
ECHO spellCheckerEnabled=true >> %SPARKPREFS%
ECHO useSystemLookAndFeel=false >> %SPARKPREFS%
ECHO defaultChatLengthTimeout=15 >> %SPARKPREFS%