Np. After you install vista in IDE mode you can enable AHCI in vista using this-
<TABLE class="list ol"><TBODY><TR><TD class=number>1.</TD><TD class=text>Exit all Windows-based programs.</TD></TR><TR><TD class=number>2.</TD><TD class=text>Click Start, type regedit in the Start Search box, and then press ENTER.</TD></TR><TR><TD class=number>3.</TD><TD class=text>If you receive the User Account Control dialog box, click Continue.</TD></TR><TR><TD class=number>4.</TD><TD class=text>Locate and then click the following registry subkey: HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Msahci
</TD></TR><TR><TD class=number>5.</TD><TD class=text>In the right pane, right-click Start in the Name column, and then click Modify.</TD></TR><TR><TD class=number>6.</TD><TD class=text>In the Value data box, type 0, and then click OK.</TD></TR><TR><TD class=number>7.</TD><TD class=text>On the File menu, click Exit to close Registry Editor</TD></TR></TBODY></TABLE>