One install, 5-pages, 5-domains

I’m setting up WP for a guy… but rather than one domain with 5 pages he wants a domain for each page. It’s not on my own server so I cant just set apache to sort it out.

Is it possible for one WP install to work as described if its run from a root account that uses subdirs for the other virtual sites?

For example:

Site A
-Site B
-Site C
-Site D
-Site E

I’m kind of up against a wall. I don’t want a separate WP install for each because each site is one page.

I’m I looking at a whopper .htacces hack, or a DB tweak, or what? (If its possible at all)