unused partition?

dear members,
During installation i select ‘partition based’ then ‘create parition setup…’ here i’ll see 2 option 1. full hard disk and 2. ‘custom partitioning(for experts)’…i selected the 2nd option.
there i will see a list of already made partition, which i did in Vista.
Suppose i shrink 1 partition from 30gb to 5 gb…i.e., 30gb is changed to 5gb…

  1. Where does my remaining 25gb goes…how to see it???
    my 2nd important questions is…
    Is it usual that the extended partition cannot be resized?? also i can’t edit the extended partition?? in linux…

the extended partitions are like a container provided just to host logical partitions so normally you can’t resize it