You can watch episodes online via HULU or fancast:
http://www.fancast.com/tv/WKRP-in-Ci.../full-episodes
I watched Turkeys Away ("as God is my witness I thought turkeys could fly!") last week.
I read somewhere that the problem with the music, and release as originally broadcast on air, has been getting the rights to all the original music that aired first time around. I guess nobody thought to put it in the contracts that when they paid for the rights, they should be able to use the music again (with suitable royalty payments) with subsequent showings. So they had to fill in with fake "bands" and songs. It does detract some but man, what a funny show.
I never could watch "The New WKRP in Cincinnati"; sort of like "AfterMASH" - trying to catch lightning in a bottle a second time around. It never works.