Copy all .txt files from P:\Sx\Sxco1\Paypoint plus the relevent MBP,MBR,MBY files.
Browse to the tills temp folder by typing the ip address in the address bar of a window on your PC or copy the files to a memory pen if there is no broadband connection.
Paste all the files copied into the following directory\\10.x.x.x\jgv602\till\data\temp.
On the till, in the paypoint screen, go to Managers Menu, Maintenance, Import Data to import it into the tills.
Press Enter to keep existing files.
The Till will go through it's import routine and update it with the files you have copied over.
N.B If you find that the multibuys are not in the till the MBR/P/Y files are the wrong ones or the till is set up as a different shop. Find out to change the shop name here.