samba and MS xp client

[vispera]

Hi all,

I would like to know how can i make , make my Xp xlients in samba domain able to modify system files like firefox files or registers or program installation ....

For example i have a logon.bat script wich conatin :

Car par exemple j'ai le script logon.bat suivant :
echo pref(^"network.proxy.http^",^"90.90.90.90^"); >> "%ProgramFiles%\Mozilla Firefox\greprefs\all.js"
echo pref(^"network.proxy.http_port^",8080); >> "%ProgramFiles%\Mozilla Firefox\greprefs\all.js"

and it does'nt work because it cant acces to program files with the write permission

Thank you to help me

[vispera]

need help please