[CentOS] size of netinst iso

Hi.

I was wanting to set up a centos 6 virtual machine using the netinst iso 
image. I've done this for Centos 5 before but I was surprised to see 
that the size of the netinst iso had gone from +/- 10Mb to 227Mb. I was 
therefore wondering if I had the right file? If so, why did it get 22x 
bigger then the previous version?

Regards,

Johan