It is illegal to transmit outside the band of your license. Your radio comes from the store with your legality in mind, that's why it says "error" should you key up on the wrong band.
Here's the mod for your 8800 that allows you to override this: http://forum.ih8mud.com/electronic-t...nsmit-mod.html
I think this is a good idea, and I will probably do this some day. In my opinion the benefits of being able to talk to police, fire, flight for life, etc. in an absolute emergency far outweigh the costs of running around with an "illegal" ham radio. I never have been much of a conformist anyway.