OK, look into the templates/orders_print.tpl Somewhere at the beginning of the file you will find this $lang['Orders_temp']. The message you are looking for is between the 'Orders_temp' and: $lang[Your_personal_information]
Maybe it is written as clear text, or as variable ($config[...], $lang[...])
The top of my order_print.tpl: ------------------------------------------------------------------- <!-- BEGIN ORDER_PRINT --> <div id="orderPrint"> <div class="message" id="ok"> <h3>$lang[Order_sent]</h3> </div> $sPaymentDescription <h4>$lang[Your_personal_information]</h4> <dl> -------------------------------------------------------------------
The variable $sPaymentDescription is what we are looking for.
I hope you have a copy of the shop on your local PC. Just mark the folder with the shop and search for any files (operating system function) where the text is: sPaymentDescription Then load the founded file/s into editor and find the phrase.