<p>I know how to change the schema of a table in SQL server 2005:</p>

<pre><code>ALTER SCHEMA NewSchama TRANSFER dbo.Table1
</code></pre>

<p>But how can i check and/or alter stored procedures that use the old schema name?</p>

<p>Sorry: I mean:
There are stored procedures that have the old schema name of the table in the sql of the stored procedure... How can i edit all the stored procedures that have the dbo.Table1 in the body of the procedure...</p>

Get a list of dependent objects by right-clicking on the table before you change the schema and then look at what is dependent on the table, make a list and then change those. There is, however, always a possibility that you'll miss something because it is possible to break the dependencies SQL server tracks.
But the best way would be to script the database out into a file and then do a search for the table name, make a list of all of the sprocs where it needs to be changed and then add those to the script to change the schema of the table.