I need to upgrade disk in Dell Inspiron 6000

I have an assignment to do a disk upgrade on a Dell Inspiron 6000 laptop; it currently has a factory-installed 80 Gb drive, which is working fine, but the boss wants to replace it with something bigger.

I looked up the specs on the 80 GB drive on the Dell website looking for any potential booby traps and found something odd. If I were to buy another 80 GB Dell drive, the "What's in the Box"  info for this drive is "1 x 80 GB Hard Drive, 1x Carrier Assembly, Screws"

What is the Carrier Assembly? will it make it difficult or impossible to put a bigger hard drive into the 6000? One of the Customer Rating posts on the Dell website had this to say about installing the 80 GB drive: "Was a little trick to work with in terms of removing the adapter in order to expose the pins for hook up to a data transfer kit."  It would seem to me that the"adapter" mentioned here is the "carrier assembly".

There are a number of bigger 2.5" droves available, but before I move forward on this project, I would like to know if this "Carrier Assembly/Adapter" is something that will cause trouble for a disk upgrade.