I currently use IE... on my desktop etc...

Can I download Firefox or one of those other free browsers and interchange using IE or the new one... such as having the icons on my desktop that goes to a homepage and I can choose each on... or does the entire computer have to reconfigure to the new browser and it causes a lot of confusiion and problems?

Yes, no problem

Just download and you will have 2 different icons to choose from

You can have them running at same time without issue
-1 maximized and 1 minimized

Hi,
Quite correct! I use four browsers; IE, FF, Op and NN. I often have multiple instances of IE running; multiple tabs in FF and Op. Each one has a different homepage so sometimes it is more where I would like to start that determines my browser; though I test my own websites in all.
More memory dependent than anything, and speed does degrade.
Peace,
Clarke