I agree with Dave that you should be able to just download from a memory card. Now you can change the data with the G10 but you won’t be able to change the “description” of the tool. If you don’t have the manual for the proper format in which you can load this data with the tool description then you could manually type in a tool description and the data then punch it out of the control to a card and look at the format so you know how to write it to the card before uploading it.
If your tool data is changing after every operation then you will have to load the program and data before every operation.
I am not up with the exact syntax of the 31i control but this should work.
Stevo