Every car (apart from some very new ones) can be 'chipped' by soldering/socketing new chips onto the ECU, this is the way all remapping used to happen.
Fitting 'socket/s' for the chips in your ECU is very worthwhile, as if you do not like your 'remap', you can just put the original chip/s back into your new socket, or swap chips or flash new maps (depending on chip type).
The later type ECU's have flashable chips, and can also use the less invasive OBD flashing, or serial write without any soldering.
For a 97 'AFN' engine, if you remove the black plastic cover for the ECU, and the metal ECU body looks like this (probably all silver on an AUDI, not black):
You 'most likely' have a board mounted MAP sensor with a tube going to it, and 2 'plcc32' chips like this (bit out of focus/dodgy phone macro):
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If so, simply use a good 'micro-electronic engineer' / microsoldering service to install the plcc32 sockets (mine cost £20):
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If you want to solder in the sockets yourself, this link explains how. They do not really need 'Hot air' soldering, and can be done by a competent hobbyist, but it is too fine for my soldering 'ability'.
http://www.elecauto.com/plcc.htm
If you have the later type ECU body (with remote MAP sensor), like this:
You can use the less invasive non-soldering type remap, or if you wish install sockets (if none are present).