Use wget tool to download YUM package:
1) wget http://linux.duke.edu/projects/yum/download/2.0/yum-2.0.7.tar.gz
2) use tar command to extract to a directory named yum
3)tar -xvzf yum-2.0.7.tar.gz
7) make install
you are done installing. Sometimes you might get the following errors on fedora 10:
1) make not found.
for this instal: yum install make
2) msgmerge not found.
for this install: yum install gettext
now the above solves your problem. Happy installing.