I've installed the plugin "WP Security Scan" on a fresh install of
Wordpress 2.6 running on a Apache server at hostgator & the plugin
says this about my table prefix.

Your table prefix should not be wp_. Click here to change it.

Change your database table prefix to mitigate zero-day SQL
Injection attacks.

I going to be installing WP Super Cache or Hyper Cache to keep my server
from crashing if I get a lot of traffic.

If I change wp_. to say ab_. will it affect the cache plugings and the
SQL database & will I have any future problems with the database.