I am a newbie. What do you call universal patcher?

here's another one, in this case the VIN does come up as a corvette. universal patcher says it is stock. OS 12221588. xdf can be found here - https://pcmhacking.net/forums/viewtopic.php?f=42&t=7990
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Thank you so much bobcratchet555
I verify them with EFI, and if everything goes well, to throw miles, well here in Spain, kilometers.
Thanks again and greetings to everyone on the forum.

Hi guys,
Nobody can help me?
The file I'm looking for is Corvette C5, 4l60, ECT, 2001-2004

Hello Friends, I live in Spain and here the LS1 engine is not very well known.
I have an '81 C3 corvette and am doing an LS1 swap with an engine from a 2000 C5 corvette.
I am looking for a 2001 to...