Well in general no sense in checking the value, just set it. But we can if you like.
Something like this (untested code)
Dim $JPath, $WV
$JPath = 'HKLM\SOFTWARE\Microsoft\Internet Explorer\AdvancedOptions\JAVA_SUN\SELECT'
$WV = WriteValue($JPath,'UseJava2IExplorer',0,REG_DWORD)
$WV = WriteValue($JPath,'HideSystemTrayIcon',1,REG_DWORD)
$WV = WriteValue('HKLM\SOFTWARE\JavaSoft\Java Plug-in\1.3.1_15','UseJava2IExplorer',0,REG_DWORD)
$WV = WriteValue('HKLM\SOFTWARE\JavaSoft\Java Plug-in\1.4.2_07','UseJava2IExplorer',0,REG_DWORD)
$WV = WriteValue('HKLM\SOFTWARE\JavaSoft\Java Plug-in\1.4.2_07','HideSystemTrayIcon',1,REG_DWORD)
$WV = WriteValue('HKLM\SOFTWARE\JavaSoft\Java Plug-in\1.5.0_01','UseJava2IExplorer',0,REG_DWORD)
$WV = WriteValue('HKLM\SOFTWARE\JavaSoft\Java Plug-in\1.5.0_01','HideSystemTrayIcon',1,REG_DWORD)
$WV = WriteValue('HKLM\SOFTWARE\JavaSoft\Java Update\Policy','EnableJavaUpdate',0,REG_DWORD)
$WV = WriteValue('HKLM\SOFTWARE\JavaSoft\Java Update\Policy','EnableAutoUpdateCheck',0,REG_DWORD)
A user would need to be a local admin to run this though or we could also code it so it could be run from your workstation against all the remote computers if wanted.