Thanks guys!
@ChrisM: I can play both Country Honk and Honky Tonk Woman. They are not too difficult anyway - but I'm never sure what key a song is in, so I never know how to play a suitable solo in the right key.
I'm playing Country Honk in standard tuning, because I'm not any good in soloing in open G tuning...
My guitar teacher once told me all the theorie but I was never interested in it...