SQL User Acces to Schema

Hello
Could anyone tell how to give to access to one schema
I mean I have schema name APPS , I want create sql user
give him access to APPS schema tables only
Thankx
Sanjay

1. create role called apps_user
2. grant select, insert, update, delete on tablename to apps_user (for every table in apps schema);
3. create user new_user_name
4. grant connect, apps_user to new_user_name

Well this not easy APPS schema itself is composed or say have access to another 10 schema GL PO AP ( This is Oracle Applications) so APPS schema might have more than 1000 tables This approach u said seems very difficult any other suggestions
Thaks
Sanjay

What's so difficult? Create a script off dba_tables, run the script, you're done.

set trimspool on
set pages 0
set linesize 222
spool grants.sql
select 'grant select, insert, update, delete on ' || table_name || ' to apps_user;'
from user_tables;
spool off

@grants.sql

If you spend 5 minutes on it, it will be a lot.