Cradoc
Well I doubt the different translations but I don't doubt the Bible because some translations are actually based off of other translations and such such as KJV which is a favorite of many Catholic and Orthodox Churches
and was MADE by the English Church and thats why I don't trust it except to help disprove these Churches corruptions and such.
You seem to have your versions crossed.
For the most part it is particular protestant Churches, such as the Baptists and some Methodists who love the KJV. Infact, there is a highly ammusing tract by Jack Chick about how it is the only true version of the bible in existance.
It was created at the order of King James shortly before the Pilgrims left for the USA, and so was the main (and for a long time the only) English version found in America, spreading the word quicker than latin versions would have among the lower class workers who made up that new society.
Today in England the NIV, or New International Version is far more popular, as it is clearer and designed for self study as well as group worship. It is an easier read, but can also claim to be clearer on may points, with footnotes about translated words and things that are missing from the KJV, which just assumes it is right in every case. It is used a lot by Church of England (Anglican) followers I know.
The Catholic church uses the Vulgate bible, a totaly different version to the others and translated in different times and ways. The main difference is that it includes the Apocrypha, a set of books seen as non-scriptural by other groups.
Other differences tend to be small, but can be interesting.
Here are some of my favorite biblical resources;
http://www.bible.org/ - a new translation, purely for the internet, including a lot of extras an information about everything biblical.
http://www.bible.com/http://www.biblegateway.com/ - quick and easy lookups for different bible verses and versions.
http://www.chick.com/reading/tracts/0031/0031_01.asp - more of a laugh than anything else, a comic outlineing a fringe groups view of the KJV and why it is the only true path.
http://www.sacred-texts.com/index.htm - a great site with many religious and philosophical texts and writings, including bible versions.
http://davidwiley.com/religion.html - another set of such texts, a bit easier to use but less extensive.