Loadind initial ramdisk problem

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http://forums.fedoraforum.org – I am new to linux. I am using fedora f16 x86_64. I was using terminal from root and used yum to install some packages. I also wanted to reinstall the libjpeg package. I used yum erase libjpeg but deleted 300 other files/packages along with libjpeg. I then used yum install libjpeg. The yum history shows only 1 package installed and 300 erased. On restarting my machine I get the Loading Initial Ramdisk message.... and don't know how to proceed. Please help .... Could this have been caused by the above deleted files? (HowTos)