>My question comes from the GRUB setup at startup of my system. Were I to remove Red Hat, would this setup be compromised?
This depends. If your installation is in the form of separate "/" and "/boot/" partitions then you ought to be fine as long as you preserve your /boot/ partition. However, if all of grub's information is stored on your redhat root partition then removing this partition will kill grub.
Unless there's anything exceptional in your grub configuration file, you'll probably be fine to:
- Wipe the current RH install
- Boot from the installation media of your new distro
- Have the new distro's installer rewrite the master boot record with its own grub configuration (having hopefully autodetected your MS partition).
Once you've nuked your redhat partition, you're only concerned about booting windows or your new distro. In the first case, you always have the "fdisk /mbr" fallback. In the second case, the installer should always take care of it.
As for your choice of distro, it's probably going to be SuSE, Mandrake or Fedora. Mandrake is fabled for its hardware detection. Fedora is the current incarnation of Red Hat Linux: it will be most familar to you. SuSE is known for its strong configuration tools.