Importing pages with different node ids to the live site
I've had this problem myself in the past, and importing nodes into a livesite can be quite a head ache at times.

Luckily there's a great module available for D6 called Node Export. It allows you to import / export nodes using a host of different formats such as JSON, CSV, XML etc. 

I've used it before exporting a large dataset and I was impressed with how easy it was to implement. 

Hope this helps.