the Dutch guys from Sygisweb.nl (so all credits go out to them) made a DOS app to make it all easier! http://www.eurosc.nl/n900/flasher.zip for the application.
Description:
Create a folder in c:/N900 and drop the zip package in there and unpack it in there as well..
Create a shortcut from Flash.exe and place it on your desktop.
When you execute it you could get a security question and J means yes and N is No. They need to be in capital letter!
Then shutdown device, open keyboard and keep holding the 'u' button while you insert the USB cable in side the computer.
There will be a distorted Nokia sign in the display and a small USB icon will appear in the top right.
Then you can choose the overclock you want.
