Ok, here is the result...
I succesfully installed Win7 x64 in AHCI mode in port 0 of ICH10R SATA controller. But after I installed all required drivers and Win7 installed 2 updates (yes, i plugged in LAN cable once I was in desktop) and rebooted. After Win7 splash animation was CHKDSK attention message, then checking, correcting some errors, reboot, CHKDSK again, reboot etc. The HDD behaved strange - it seemed that heads were parking themselves after evry 5-6 seconds, then resumed working. Have not tried it in IDE mode now, but tried it many times before, HDD will stuck after the first reboot during Win7 installation.
Will try to install Win7 using GSATA, disabling ICH10 SATA if possible.