I suggest that you install VirtualBox, then install your Centos 4 os
within it.
* You don't risk your established data etc.
* The Centos 4 will have its own IP address, your legacy system
will be fine, of course it will have the security vulnerabilities that
go with the old OS, but these won't infect your broader systems.
* by the sound of it you won't need USB support, so the free
VirtualBox ill be ok. (If you need USB you have to get the one from the
Oracle website, free for individual use, modest fee otherwise.)
Ross
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