System and network response slower

[Aaron Kincer <kincera kintelwireless com>]

After the following package updates (ripped straight from the update 
log), my system is slower and network response is almost unusable.  In 
other words, anything using the Internet is miserable now including e-mail.

[Tue Mar 30 12:36:44 2004] up2date installing packages: 
['kernel-2.6.4-1.298', 'kernel-utils-2.4-9.1.126']
[Tue Mar 30 12:56:46 2004] up2date installing packages: 
['SDL-1.2.7-2.1', 'SDL_mixer-1.2.5-1', 'alsa-lib-1.0.3a-1']
[Tue Mar 30 13:07:50 2004] up2date installing packages: 
['bash-2.05b-38', 'fedora-release-1.91-6']

How do you roll back to older packages?  I can't hardly use my computer 
now.  Also worthy of note is booting to older kernel versions DOES NOT 
fix the problem.