Regarding Windows 2000

Hi,

I have three questions.First in Windows 2000 when we create user in active directory there is one option Remote Control I would like to know what is the use of that option.
Second What is the major difference between Windows 2000 Server,Advanced Server and Data Center.
Third is there any web site from where I could download the tutorial for ISA.Because I want to configure ISA Server in Windows 2000 Advanced Server.

I would appreciate if someone assist me.

Thanks and Regards.

Anurag Goswami.