How to loop columns of dynamic temporary table which is created inside storedprocedure in sql server 2005

Please check the below code to create columns dynamically for a table using SQL query.
“#tClients” is a temp table having accounts as per search criteria ( this table may have mutiple rows)

--create table with DYNAMIC columns
create table Clientslist( EmpUID int, EmployeeName varchar(50),JobStatus varchar(25), JobCode char(2),
Category char(1),TotalLines decimal(18,5), Supervisor varchar(50),
dummy bit)
Declare @Script as Varchar(8000)
Declare @Script_prepare as Varchar(8000)
Set @Script_prepare = 'Alter table Clientslist Add [?] varchar(100);'
Set @Script = ''
Select @Script = @Script + Replace(@Script_prepare, '?', [Code]) From #tClients
Exec (@Script)
Alter table Clientslist drop column dummy


--to do DYNAMICALLY some operations
DECLARE @i int, @SQL varchar(4000), @TableName sysname, @ColumnName sysname, @rc int
SET @i = 8 --Starting position of dynamic columns

SELECT ORDINAL_POSITION, TABLE_NAME, COLUMN_NAME
INTO #Temp
FROM INFORMATION_SCHEMA.COLUMNS
WHERE TABLE_NAME = 'Clientslist'

SELECT @TableName = TABLE_NAME, @ColumnName = COLUMN_NAME FROM #Temp WHERE ORDINAL_POSITION = @i
SET @rc = @@ROWCOUNT
WHILE @rc <> 0
BEGIN

DECLARE @t_Lines decimal(18,2)

--here I am updating linecounts in the table for dynamic columns
SET @t_Lines=0
SELECT TOP 1 @t_Lines=cast(Lines as decimal(18,2)) FROM #tEmpClient WHERE Category='T'
DELETE FROM #tEmpClient WHERE SNo=(SELECT TOP 1 SNO FROM #tEmpClient WHERE Category='T')
SET @SQL = 'UPDATE ' + @TableName + ' SET ' + @ColumnName + ' = '+Convert(varchar,@t_Lines) + ' WHERE Category=''T'' AND EmpUID='+convert(varchar,@t_EmpUID)+''
EXEC (@SQL)


SET @i = @i + 1
SELECT @TableName = TABLE_NAME, @ColumnName = COLUMN_NAME FROM #Temp WHERE ORDINAL_POSITION = @i
SET @rc = @@ROWCOUNT
END

SELECT * FROM Clientslist

DROP TABLE #Temp
DROP TABLE Clientslist