One other thing to keep in mind is the AHCI driver is usally disabled by default in W7, so if you enable AHCI and get a blue screen when load/install windows don't panic. You may need to boot computer from IDE mode, install w7, and then either run the microsoft "fix it" utility for AHCI if you are not comfortable playing around in the registry or do the following:
1.Exit all Windows-based programs.
2.Click Start, type regedit in the Start Search box, and then press ENTER.
3.If you receive the User Account Control dialog box, click Continue.
4.Locate and then click one of the following registry subkeys:
5.In the right pane, right-click Start in the Name column, and then click Modify.
6.In the Value data box, type 0, and then click OK.
7.On the File menu, click Exit to close Registry Editor