[Yum] installing/upgrading an os over itself

[bruce]

hi...

is there a way to use yum to reinstall an OS on top of itself... i started
to upgrade to FC2. i ran out of harddrive space, and had to remove some
files/make space... i tried to do a 'yum -upgrade' again... and yum came
back and said no new files, or that it didn't have aything new to
update/upgrade...

it appears that something was changed, enough so that yum thought FC2
already exists on the system. trust me.. FC2 is not completely on this
system!!

so how can i get the system/yum to a point where i can try to continue to
upgrade/install FC2...

thanks...

bruce