Semi-archiving old blog, starting with new one.

I have a blog at http://firesika.com that I was using as my Peace Corps blog. Now I’m back, and once I’m done catching up, I want to switch my blog around: New title, new theme, new banner, new pages, etc. I know how to do all that.

BUT, I would like to have my old blog still available with the current theme,title, pages, etc. The pages I currently have are mostly about the local language and other terminology, and are therefore intrinsically necessary for what I’ve been writing so far. But, they won’t be necessary for most posts I write of my post-PC life. So, I think for the new blog, it would be distracting to have those irrelevant pages visible.

Ideally, what I’d like is for(once I’ve made my changes) someone to be able to go to firesika.com and see my new blog there, with a tab to what will then be my old blog. I’d like all the links between posts to still work, and I’d like the reference pages to still work but only for that blog.

I don’t mind if the old posts stay accessible on the main blog, I just also want them accessible as they should be seen as well.

I’ve looked at the custom page theme instructions and at how to make a page have only posts from allowed categories, but those tools don’t seem to deal with my page problems.

I’m willing to look at easier ideas too–would it be possible to have links that only show up on the old blog page, and either have the original pages invisible or turn them into posts and only have them available through the links? Or, anything else that would end up with the same effect but would be easier to do.

Thanks!