Help installing 2 Wordpress Blogs & Themes

Hey gang, I have been working with Wordpress for a very long time, but I've always installed different blogs on my own server, and never had any trouble. I am trying to install TWO different Wordpress instances on the same server, and have been having some trouble. Need to find someone who is familiar with MySQL, phpMyAdmin, and Wordpress to help me understand what's wrong -- probably a fast and simple job for the right person. I will delete the 2 installs that I have, you install the blog in two different directories and install 2 themes, and if everything is working fine, then we're all done! Need this work done very soon -- please specify turnaround time in your bid! Terrence