Let me start off by briefly mentioning that I've never used Fedora, never even heard of the program you're trying to install, and I'm only trying to help
bash: alternatives command not found
1. Is your $PATH variable set to the directory that contains the program you are in?
2. If you are trying to run this command from a directory NOT found in the $PATH variable...
1. Enter the Directory
2. type ./alternatives
the . refers to the current directory to prevent bash from searching those in $PATH. Therefore, this executes the alternatives command within the current directory
Concerning your non-rpm build of version 1.3.20-11
This will be a pain, since if you want to remove it and have a "clean" install of the new versions, you need to remove the old one. Skim through the directory of this program (if you know where it is, if not use the find or locate command to search for it) and look for any piece of info that might help you search for every last directory where this program was installed. Go through this directories one by one and remove them. The easiest way is to enter the directory and type "rm -rf ./*" and then "rm -rf ./\.*" to remove all the contents. Then type "cd .." to go to the parent directory and use them rmdir command to remove the directory you wiped out
Concerning Dependancies of the new version
Except for any conflicts, the dependencies have NOTHING to do with the old version. All they mean is that "you need *some* program in order for this program to work". This basically means that you should search for those programs using whatever package management tool Fedora offers and install them. Note that some programs need specific versions of the dependant-programs to run (perfect example: most programs use the older version of automake, but its a GOOD IDEA TO INSTALL BOTH [or more if available] VERSIONS IF YOU ARE UNSURE)
I honestly am not sure how those work out. If I am correct, it's merely a matter of wiping out the conflicting files and possibly changing other configuration files. But I honestly am not sure
Like I said, I'm not very knowledgeable with your problem, distro, or software program you are trying to install, I just hoped that I've helped, even in the slightest way