spearmint,
What errors are you getting "from the botched install of sfp13-vim"?
I am not aware of an automated uninstall, but it should be fairly simple to get it removed.
Take a look at your home directory, during installation spf13-vim made backups of the original vim files
.vim => .vimYYYYMMDD
.vimrc => .vimrcYYYYMMDD
.gvimrc => .gvimrcYYYYMMDD
This should restore your default (I have not tried it):
rm .vim
rm .vimrc
mv .vimYYYYMMDD .vim
mv .vimrcYYYYMMDD .vimrc
mv .gvimrcYYYYMMDD .gvimrc (if it exists)
optionally you can delete .spf13-vim-3
hgg