1) You won't. Microsoft has chosen not to document all of the extended stored procedures in the environment. Researchers like Alex Chigrik have written some articles covering undocumented extended stored procedures, but I don't believe any article covers 100% of the extended stored procedures.
2) Not without some tricks, no. People have done this using ODBC connections, with xp_cmdshell and the resultant temp table, among other methods.
K. Brian Kelley
http://www.truthsolutions.com/
Author: Start to Finish Guide to SQL Server Performance Monitoring
http://www.netimpress.com/shop/product.asp?ProductID=NI-SQL1
K. Brian Kelley
@kbriankelley