accessing other distro files

[Thomas Beckett]

I run Breezy here at work but also have to develop scripts for centos.
I have a centos installation but all the files i wirk with aer owned
by my username in that install. My username is the same on both
installations but Ubuntu starts users at UID:1000 whereas CentOS uses
500. Can I change my ubuntu users UID to 500 so that I can access the
files I need unrestricted. If so will it automatically change the
files in my home dir to 500 for me?

Many Thanks

Tom