Search: Where indexes are stored? How to change the indexes location?

[What you have]:
A farm with search enabled.

[What you want]:
You want to change the default location of indexes


[What you want to know]: 

The default location for indexes is:

C:\Program Files\Microsoft Office Servers\12.0\Data\Office Server\Applications\{GUID of the content database}

[What you want to do]:
Go to central adminstration -> _admin/managessp.aspx
Click properties - Index Server -> Path for index file location