Hi Blaze,
We'd have to get the car on a dyno and get it remapped - it can be done but needs to be enough demand for your engine to offset the dyno time.
For things like red-line cuts, I just need to look at the EEPROM dumps (perhaps using an EEPROM emulator) to work out the locations the ECU accesses and the format the data is stored in - after which its just a matter of changing a value from say 7200 to 7800.
Although the process is exactly the same for your fuel and ignition tables, without having the car on a dyno its impossible to know the correct values to put in to the tables - granted you could guess and say increase all the ignition advance by say 2 degrees but you don't know if this is improving or making performance worse (could be too much ignition advance causing knock for example).
Matt.