Concatenating in a Group By

Hi Guys, I am converting Access SQL to SQL Server and I have two problems:
First of all I cant get the city, state and zip to concatenate. It will not take the "As Location"  and it will not allow me to concatenate the fields in the Group By area.
Second I m trying to replace a First() function with a Top() function but Im not having much success.  If it is not the first statement I get an error (Incorrect syntax near the keyword 'TOP'.)

Any ideas how I can accomplish what it is I want to do?

Thanx much,
Trudye

BEGIN
      
      SELECT Date AS DateEntered,
       LTRIM(RTrim([ResultsCustName])) AS CustName,
      Timestamp, LTRIM(RTrim([ResultsPH])) AS Phone,
      TOP (1) tblEscalationData.Explain_followup AS FirstOfExplain_followup,
      [ResultsAddr1] AS Address1, [ResultsAddr2] AS Address2,
      [ResultsCity] AS City, [ResultsST] AS [State], [ResultsZip] AS Zip,
      ERROR
INTO zTmp_Training
FROM tblEscalationData
      LEFT JOIN qry_IssuesPrint
      ON tblEData.ResultsPKey = qry_IssuesPrint.ResultsPKey
      LEFT JOIN LOOKUP_DATA
      ON tblEData.DSLOAN = LOOKUP_DATA.DSLOAN
      LEFT JOIN qry_IssuesPrintDef
      ON tblEData.ResultsPKey = qry_IssuesPrintDef.ResultsPKey
      INNER JOIN qry_CurrentStatus
      ON tblEData.ResultsPKey = qry_CurrentStatus.ResultsPKey
      LEFT JOIN tblErrors
      ON Error = SUBID
WHERE tblEData.CSRReporting= 1 AND
      qry_CurrentStatus.Date
             Between @Start_Date And @End_Date
             AND Source = @CallCtr
             AND ERROR Is Not Null
ORDER BY LTrim(RTrim([ResultsCustName]))

END      
--qry_CSRTraining (Group BY Clause)
BEGIN
      SELECT DateEntered, LTrim(RTrim([CustName])), [Timestamp],
      LTrim(RTrim([Phone])),
      [Address1] + ' ' [Address2],
      [City] + ' ' + [State] + ' ' + [Zip] As Location,
      [Name], ERROR
      FROM zTmp_Training
      GROUP BY DateEntered, [CustName], [Timestamp],
      [Phone], [Address1], [Address2], Location,
      [Name], ERROR
END
Start Free Trial