I am about to perform a Redhat Install on one hdd, on the other I have my NTFS partition with MP3's, video and so on.. I have two questions... Will Linux be able to read the NTFS and copy all the stuff to the other hd (one that lin is goign to be installed to) ...

and secondly, if I do manage to move all my files, how will I format the NTFS to a linux partition and make it work completely in linux .. ? What I do with XP, is use one hd for windows, and the other for all my files that can't be deleted .. When I goto format or install win$ I just format the windows drive and not the other one, I'm hoping to work something like this out with my linux installations and partitioning ...

Redhat doesnt support ntfs out of the box but you can download the kernel module here:
http://linux-ntfs.sourceforge.net/rpm/index.html
Make sure the one you download matches your running kernel
To format the partition you can use "mke2fs -j /dev/hdXX" to format it ext3, "mkreiserfs /dev/hdXX" if you want reiserfs, not exactly sure whether Redhat comes with reiserfs utilities but you can download it anyway.
If you're only gonna use it to store files then I recommend you format it FAT32, this way both operating systems can see and write to the partition, but its your call.