Don't ask why but my client doesn't want all order emails being send. Is there an easy way to stop this? He wants to send these mails himself. So all automatic outgoing emails (order) needs to be stopped. When there is a new order don't send any email and also on the other order mails after that (status/updates etc).
I think the most simple way for your version is to install a module like
Aoe_Scheduler which allows you to disable specific cron tasks, and disable core_email_queue_send. As far as I know, in 188.8.131.52 the only emails that use this cron task are order confirmations. You should check first to be sure, though.