changing App Pools

Hi, We run a single windows 2003 iis 6 web server with 10 web sites running
on the server.
if I create a new website (WEB11) and then change the default application
pool, to something other than default (WEB11 App pool for example) it causes
iis process to restart. this gives the other users connected on sites 1-10
an interruption in service for 5-10 seconds. is there any way to avoid this,
or scrip the creation by specifying new web site name and which application
pool to use, WITHOUT restarting IIS.
Thanks