I do enjoy having the option of overriding the ECU when I want more or less power. With the switch in position 1 you'd still get the stock computer modulation of the boost for smoother power delivery and the failsafe backoff to lower boost if knocking is detected. You'd still be able to tone the power down in the winter time and have full boost available for play time and stoplight races. Note that this shouldn't be done on an XR without an intercooler. I use this method now that I have the Modern Performance intercooler installed in my engine bay.
Standard disclaimers apply.
If you blow up your engine or crash your car I'll feel really bad but can take no responsibility. I like feedback. Please let me know if any details need clarification or if you have any problems that I can help resolve. If you try this modification, please drop me a line and let me know what you think of the results. This is, I think, a cheap modification that can make anyone's XR more fun to drive, and instantly adaptable to various driving conditions.