title: Results form sp_spaceused in one recordset
body: <p>I would like to collect all databases statistics which contain database size and unallocated size.
  I'm trying to use sp_spaceused stored procedure, but unfortunately I am unable to write results (this procedure get two result sets for each database) to temporary table.</p>
  
  <p>My idea is to modify code of this procedure and save it as new one.
  What I should change?</p>
  
  <p>It will be enough to concatenate two select statements?</p>