I have a region 2 DV-525. My questions are:

Can I make it multiregion via menus? (have tried one method posted here
http://uni-electronics.newmail.ru/p525user.htm) This didnt work.

If a chip upgrade is required, where do I go for it?

Where can I get any firmware updates, and details of how to install them
if this is the way to multiregion.

Can the macro's be disabled