Preventing Application Startup
As eldarerathis commented: Your explicit question is already answered:


How can I prevent applications from running on startup?
how to identify and change apps which are set as startup items


However, I see an implicit question here as well: As you don't want to use this app at all, you might want to "get rid of it". While starting with ICS (Android 4.0) you can freeze (disable and hide) most system apps even without root, on previous versions that is only possible with root. Several apps are available on the playstore to help you with this (just search for bloatware).

The best known and highest recommended in this area is Titanium Backup which, as the name suggests, as a "side-effect" even manages your backups (and does this really good -- I use the Pro version now for about 2 years). With this app, you can even create yourself a shortcut to freeze/defreeze an app (in case of rarely used ones). Then there are also NoBloat and Root Uninstaller, amongst others.

So if you are rooted, and if you really do not need that app, freezing it is the safest way to ensure it doesn't start. I've heard of apps still auto-starting though they were "disabled" by those anti-autostart solutions. If, on the other hand, your device is not rooted -- you can only use the "simple no-root solutions" described "over there".