Adding Application server guide ?

hello friends,

We are having SAP 4.7 x200 ,with MS SQL 2000 .

Our current production server is acting as both database server

and application , now due to performance issues we are planning

to add new application server along with older one ,keeping older as it

(we want to keep older server as database and application and newer one as only application).

I am looking for SAP notes in accordance with above landsacpe configuration .

thanks in advance

jase