Hi,
1 - funkmunk - Id did already overlock it but it was still coming down to 125 mhz in idle ... BUT
2. epitaph - Your idea worked perfecty (so far ;-)). Maybe because i did overlock it and after kernel-config load ideal its not coming low with Mhz not lower than 250. I dont remember which package with clock-set-up i did flash N900 with but it WORKS.
Now it appears im on intense linux course..