Nice Design your Forum have Shadow are the ppc apps in english?

?-!/!-)

Riva..., whats now better or is this much different from RivaTuner 2.0 - Final ???

It cannot be even compared to RivaT. RT is a complex tool capable of changing the behavior of the card in many ways including the unlocking of disabled pixel and vertex pipes. It also can alter hundreds of undocumented driver entries, it can overclock/underclock the graph. card's core and/or memory, turn regular card into "quadro" etc. . .

have it the needed firmware flasher inside to make the boost of power permanent?

uffff no differences a switching reg entries and little bit .inf files maybe. It have no developer mode for edit firmware and keep the settings permanent for "advanced".

Depends on what you consider "permanent". If you overclock it by RT and state that it should be "saved" and started with Window$, it will stay overclocked until you uninstall the driver or change the setting manually. This way you almost cannot make any permanent damage to the card - Riva allows you to switch back to the default values (all driver settings go to default by one click of the mouse).

Now, if you want to overclock in a "hardware" mode, you can do this very easily by flashing the BIOS of your card. In order to do this (if it is a Nvidia card) you have to use 2 tools: nvflash - to grab the BIOS file and the programs like NBitor or Nvidia BIOS modifier to change the core (GPU) and/or memory clocks. All of this, including the detailed explanations can be found on lots of sites/forums (www.guru3d.com, among the many).
Be careful, don't push it too much at once, don't alter memory timings and the voltage - you might end up not being able to boot if anything goes wrong way!