With the system tables, there is a better way to code this stored procedure. I spent an hour today and came up with this development for you and also added as parameter the database, because if you have 100 databases on your server, you do not want to copy the stored procedure but rather have a repository (centralised database for this).
Here is the code, tested on Sql server 2008.
Enjoy!

– script
Use
GO
CREATE Tool Authorization dbo
GO
CREATE PROCEDURE Tool.SearchAllTables
(
@DbName sysname,
@SearchStr nvarchar(100)
)
AS
BEGIN

– COPYRIGHT Clement Huge 2010-07-17: search specific string within a specific database data
– sample: EXEC SearchAllTables ”, ‘data’

CREATE TABLE #Results (ColumnName nvarchar(370), ColumnValue nvarchar(3630))

SET NOCOUNT ON

DECLARE @SearchStmt nvarchar(MAX), @TableName nvarchar(256), @ColumnName nvarchar(128), @SearchStr2 nvarchar(110)
CREATE TABLE #Stmt (Stmt varchar(max))

SET @TableName = ”
SET @SearchStr2 = QUOTENAME(‘%’ + @SearchStr + ‘%’,””)

SET @SearchStmt =
‘
SELECT ”SELECT ””” + S.name + ”.” + Ob.name + ”.” + Co.Name + ”””, LEFT(” + Co.Name + ”, 3630) FROM ['+ @DbName + '].['' + S.name + ''].['' + Ob.name + ''] WITH (READUNCOMMITTED) WHERE ” + Co.Name + ” LIKE ”’ + @SearchStr2 + ””’
FROM ['+ @DbName + '].sys.syscolumns Co
JOIN ['+ @DbName + '].sys.tables Ob ON Co.id = Ob.Object_Id
JOIN ['+ @DbName + '].sys.schemas S ON S.schema_id = Ob.schema_id
WHERE Co.xtype IN (select xtype from sys.systypes WHERE name LIKE ”%char%”)
‘
INSERT INTO #Stmt
EXEC ( @SearchStmt )

DECLARE Cur_SearchList CURSOR FOR
SELECT Stmt FROM #Stmt

OPEN Cur_SearchList
FETCH NEXT FROM Cur_SearchList INTO @SearchStmt
WHILE @@FETCH_STATUS = 0
BEGIN
INSERT INTO #Results
EXEC ( @SearchStmt )
FETCH NEXT FROM Cur_SearchList INTO @SearchStmt
END

CLOSE Cur_SearchList
DEALLOCATE Cur_SearchList

SELECT ColumnName, ColumnValue FROM #Results
END