How do u install .sis file into Nokia6600?

I m new to my N6600 n donno how to install the .sis file into my phone. I cant find anywhere which gives instructions on how to install... Pls help. Thx! __________________ You must have a bluetooth or infra-red adaptor for your PC. Do you have one? __________________ Oops! Looks like I hv gotta spend more on this lovely lady of mine. I was thinking of getting a Bluetooth device next week but which would u recommend? Bluetooth device or Infrared? (Provided both devices cost nearly same price) Thx! __________________ of cos i will choose bluetooth.... more easier to use.... __________________ Sorry guys new to all this what does the .sys file do ? __________________ You can e-mail a *.SIS file to the phone and it will also install the file.