Upgrading Drupal

Hi, anyone, i have a question :
i want to redirect the example.com to www.example.com ,but it donest work.... i search the problem with several days, i do make changed to the .htaccess:
# To redirect all users to access the site WITH the 'www.' prefix,
# (http://example.com/... will be redirected to http://www.example.com/...)
# adapt and uncomment the following:

i want to that when i go to site.com/node2, i will go to last page.
example:
i sent 5 page. last page's name is asdf (5. page). user viewed site.com/node2. site.com/asdf will be opened by rules module. how do i do?

The thing is i followed the instructions but nothings happen there is no development...

With all the security updates coming out, it seems like one has to upgrade Drupal every week. And with the core, plus three modules, the instructions in UPDATE.txt seem really long and a little, heh, wishy washy. E.g.

Hi,
I have a 5x site that needs upgrading to D6. The problem is the Usernode module, which does not exit in D6. (so I will be using a module called Contenet Profile)
My Usernodes have a CCK text field called "About me". Over the last 3 years people have entered a lot of data into that CCK field.
Problem:
If I uninstall the Usernode module, then I will loose the Usernode content type and all Usernode node, including the data in the CCK fields.

Hi,

I've been working on a new drupal website. I was a n00b to the system before last sunday and now I'm starting to get teh hang of it.

However for some reason now when I go to my website, I simply get a "page cannot load" screen. I can't access any of my pages and can't access the admin menu. The /user extension doesn't work either. It is simply the default page cannot load browser window.

Last thing I was doing earlier before this happened was trying out some different themes?

Can someone tell me how to recover?