[OS X TeX] Problem with aspell

[Jimi]

> I am converting from 10.4 PPC to 10.5 INTEL.  I just installed the  
> MacTex 2008 package and downloaded MacTextras.  Because I had used  
> ispell/aspell for text files and in my alpine mailing program, I  
> installed aspell.  I cannot get it to work.
I have always wondered why should one use a third party spell-checker?  
Why not use the built-in checker? Has aspell any advantages?

Thanks for any tips or links.
Jimi