I m not sure whether this work or not..
Give a try...
According to me rapid release updates are available in ftp site...
ftp://ftp.symantec.com/public/english_us_canada/antivirus_definitions/norton_antivirus/rapidrelease/
so you can write a ftp script to log in to ftp.symantec.com (anonymous user name password should work)
then mget *.jdb file...
you have to make sure you will create a ftp script and batch file inside "Program Files\Symantec\Symantec Endpoint Protection Manager\data\inbox\content\incoming" folder. Schedule the batch file to run any time you want...
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create a file rapid_download.scr and put this...(Use notepad to type and save as rapid_download.scr)
anonymous
anonymous
cd "public/english_us_canada/antivirus_definitions/norton_antivirus/rapidrelease/"
mget *.jdb
quit
create a file Rapid_download.bat and put this.
@ECHO OFF
ftp -s:ftp_get.scr ftp.symantec.com
exit
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I have not tested.. because i don't have ftp access in out setup... just an idea... you can test it and tell me...