how to allocate expended memory in XP?

Hi,
Sorry for placing it in SQL Server Forum.But I couldn't find a appropiate forum for my question.Can anybody help me?
My question is -
How to allocate expended memory in windows XP?
Thanks!!
Joydeephttp://support.microsoft.com/newsgroups/default.aspx

I can't help but I thought you might use this link to Micorsoft Newsgroups!!!