I,ve built my site with wordpress, but......

Hello

I am a photographer, and I needed two completely different sections to my website, #1 for social photography #2 for commercial photography, so I have a htm. homepage which then links to two seperate instalations of wordpress 2.7

My concern is that the wordpress instalations are too deep in my site to be SEO friendly, what can I do to improve my sites structure???

Any advice would be greatly appreciated.

Thanks