What's the easiest way to create a temp table in SQL Server that can hold the result of a stored procedure?

 If the procedure to solve SQL server creates a temp table just returns one result set and the ad hoc distributed queries option is enabled.

SELECT * INTO #T FROM OPENROWSET('SQLNCLI', 'Server=(local)MSSQL2008;Trusted_Connection=yes;', 'SET FMTONLY OFF;EXEC sp_who')
Or you can set up a loopback linked server and use that instead.
EXEC sp_addlinkedserver @server = 'LOCALSERVER', @srvproduct = '', @provider = 'SQLNCLI', @datasrc = @@servername SELECT * INTO #T FROM OPENQUERY(LOCALSERVER, 'SET FMTONLY OFF; EXEC sp_who')