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The only way to do this is to select "manually manage music and videos", and then use the autofill facility in the "Music" device content page (not sync tab).
 
That is no good for filling the ipod with entire albums.

So, I found NanoFibre.

But that also fills with full podcasts.

To skip podcasts, build from the NanoFibre source, replacing lines 132 and 133 in MusicLibrary.m with:

Code:
if ([track objectForKey:@"Disabled"]) {
   continue;
}
if ([track objectForKey:@"Podcast"]) {
   continue;
}

USE AT YOUR OWN RISK
 
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