[HELP] Create A Wordpress Blog Section On My Xsitepro Site

I have a website running for 2 years now using Xsitepro. It was a micro site with about 10 pages about a specific niche.

I want to make it bigger but I don't like to add too much content using Xsitepro. Is there anyway I can create a separate Wordpress Blog section on my site that I can update contents to it.

Let's say it like this: http://mywebsite.com -> http://mywebsite.com/wordpress-blog.html (this is where I add my new content).

How can I do this? Please give me an advice.

Btw, should I better just add content to the site the regular way or create a separate section blog to add content? Which one is better? Sorry for my English.

I was thinking of creating a subdomain: blog.mywebsite.com and use wordpress on this. Do you guys think it's better to have a subdomain or have my blog locate like this: mywebsite.com/blog?

Anybody? Please advice.