If you delve deep into one of the Booster Plug threads youíll see I gave step by step instructions, Iím a bit busy atm to give you a direct link.
The Booster Plug worked for me, and I think about 90% of users. So for 10% it doesnít.
Iíve had mine for a year and 11,000 kms and it fixed the terrible throttle snatchiness 100% so for me it was worth buying.
When the bikeís out of warranty Iíll very likely go for a reflash.