I just follow mosens and peters info about what to install.
from the flasher 3.5, rescue OS1.3, recue OS n900 kernel 1.3zimage, libuswin 32 bin 1.2.6.0, extract inf wizard from bin...
its being hard, guys I nearly give up as per my last post but I must say that thanks to mosen I didn't. now im happy I didn't.

if it happens to someone else I d like to contribute here adding that the order of things was:

in promp command tipe as per mosen:
cd C:\program files(x86)\maemo\flasher-3.5>

now is when I connected the phone.

then tipe:


flasher-3.5 -k rescueOS_n900_kernel_1.3.zImage -n rescueOS-1.3.img -l -b"rootdelay root=/dev/ram0"


and then as per codetracer, Run inf-wizard.exe (bin folder in zip) - Run as Administrator and just click in next until the screen disappears.
then go again to the inf wizard and click in install now

and if I remember well that was it.

thanks guys again for all your help and patience