1)For Win XP, you can use below command line to schedule Proset installation in silent mode:
msiexec.exe /i "Intel PROSet Wireless.msi" ADDLOCAL=WIFI_Driver,WIFI_Software,WIFI_UI,WIFI_PLC,WIFI_Admin_Toolkit,WIFI_Troubleshooter /qn
Above command will install SSO and Admin toolkit too. If you do not need them, you can remove it from cmd line.
You can programmatically check the success of installation through return code of msiexec.
2)To install profiles silently, you will have to create a IT Admin package and install that after Proset installation has succeeded.