1. Edit the file /boot/grub/grub.conf
Change the line that says "Label other" to "Label whatever you want"
2. smartd is a tool to monitor the life of your ide hard drives. You have not givin any info for us to help troubleshoot this, but I assure you, unless you really, really, REALLY screw something up, a clean install is very rarely needed, and is a particularily shortsighted/hasty remedy only practiced by those without the patience to troubleshoot the problem.
3. Never tried a winmodem. Heard they suck, but I also heard you can get 'em to work...
4. RPM is a binary package. Tarballs are source code. To install an rpm:
# rpm -ivh foo-package-i386.rpm
There is also a gui for installing rpm's. Don't know what it's called. Someone running FC can tell you. I'd stay away from source code for now...especially if you're already asking for a wizard, as it can be quite tricky for a noob to build something from source. That's not to say I don't think you should learn anyway
EDIT: sorry, that grub line above should of courswe be:
Change the line that says "title other" to "title whatever you want"