Blog URL different than install path

Hi,

My blog is hosted at https://www.indibloggies.org/blog and I wanted the blog URL to be https://www.indibloggies.org. I know that this is possible from the Options menu. But I wanted my home page to behave like a typical website from where I could link to my blog, show headlines, have a poll etc. Therefore, what I did was to drop a page called home.php in my theme folder and put the required code in it. Next, I moved the index.php file from https://www.indibloggies.org/blog to the root i.e. to https://www.indibloggies.org. I also updated the .htaccess as WP suggested. Everything works fine at https://www.indibloggies.org.

Now to the problem. I try to do similar thing with my WP2.0 blog that is hosted at a “subdomain” https://nullpointer.debashish.com. However, a similar strategy does not work this time. The only difference is that https://nullpointer.debashish.com is a sub domain, not a simple subfolder.

Questions:
(1) Is this problem due to the sub-domain? If yes, can I get rid of it?
(2) My blog URL https://nullpointer.debashish.com is already known and if the permalinks now change to something like https://www.debashish.com/url that will break links. Is it, therefore, possible to create a static home page like at https://indibloggies.org using the same WP install without disturbing the current blog at https://nullpointer.debashish.com?

Thanks for your time.

Debashish