leonscape - about a minute after reading your message, I had a command prompt available to me. Thanks a million!
I won't try to tackle any serious diagnostic work until tomorrow, but now that I have a command prompt again, maybe I should focus on getting the new kernel compiled and running properly, since I'd probably break X again in the process anyway.
UltimaGuy - I got runlevel 3 working by simply adding " 3" to the kernel line. Would you recommend using " init 3" instead?
Thank you both very
much for having taken the time to help me!
"The trouble with computers, of course, is that they're very sophisticated idiots."