Hi,
1. It should be fix for HikaShop 3.0 and I'm afraid that we can't provide you the patch like that, it contains too much modifications on several files.
2. You can customize your email by changing some translations or by editing directly the email content.
In the email content (the "html" one), you will see some "tags" for the usage of translations (TXT:...) by overriding these translations you will change the email content.
www.hikashop.com/download/languages.html#modify
Because the email is the "order creation notification" if you modify his content it will not affect the other email sent when the order status is changing. But it could require some PHP/Development skills depending the kind of customization you want to do in the email.
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.