As @personall said, you need to use socketing method:
1. carefully de-solder your ECU chip,
2. READ IT and save the file (so you can modify it later on),
3. change maps according to his instructions (swap yours with his - only the one he said that should be modified)
4. burn it on new AM29F200 chip
5. solder chips socket plug it in and test it ;)
You definetly have MSA15.8
If you had a classic V70 (not the newer 2000-2008 shape) there could be MSA 15.7, not MSA15.8.
The first thing you notice in the car that is different is the MAF - if its round BOSCH it is 15.8 and the older model has the
old style MAF whit big black box on it.
Regards, Tarzan