Dear CB
 
You haven't mentioned much about your system so I can only make a wild guess at your problem. 
I will base my guess on 
a) You probably run Win XP 
b) Have a fairly modern PC  
C) You wrote the following: 
 Quote:
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				My problem began when I moved my music files to an external hard drive. I began to get a message that there was an issue with my directory. When I attempted to redirect to my external HD, it would shut down. So, I decided to reload limewire completely at the "Pro" level. The installation went OK (the .exe program is on my C drive but my music files are on my D drive.
			
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  Most PCs "D" drives are either CD or DVD players/writers,  it could be that you have mistakenly set your external as a "D" drive when it should be "F" or beyond. 
Therefore, to be safe, check your drives letters and make sure that your external has a different letter to anything else on your system, this will also include digital camera memory drives (these have drive letters too). 
This may sort out your "directory/drive" problem.   
UK Bob 
PS. I run a couple of externals as well, which I have lettered "I" and "N".