In short, you can't do that.
You'll need to either run the proc within a cursor, store the results into a temp table (insert into <table name> exec <proc>) or identify what the statements within the proc are and use those within the select (depending what they are)
Gail Shaw
Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)
SQL In The Wild: Discussions on DB performance with occasional diversions into recoverability