Thanks for your replies, ladies!

Scrummy, both my chest- and back muscles are quite strong (well, in comparison to each other, their strength is in balance, I'ld rather say, I know there are women on this board who are twice as strong

), but this applies to the internal rotators only. According to the t-mag article, internal vs external strength should be about 3:2, for me that's something like 3:1! That's why I'm focusing on my external rotators so much, they are much too weak in comparison to my internal rotators!
I don't have access to a good PT, my physician will only prescribe Mensendieck therapy to me and that only bores me so much that I can't stick to it

LOL, I had this therapy two years ago, I don't remember over half of the excersices anyway. Fitfossil, I've never heard of rolfing .. working on the fascia, LOL, that sounds painful

Anyway, I'll take a look at the sites, I'm really curious if we have this in Europe already .. We tend to be a bit lagged in these kind of things

Same thing with spinning, it really kicked in now, but that took years and a friend of mine who had been in the States often (in fact she's over there right now) already knew it five years before it became popular over here.
A specific question about the schedule: don't you think it will cause overtraining? 4 days geared towards shoulders is perhaps a bit too much? Re more than 12 reps, that's exactly the problem I have with Mensendieck therapy .. I won't stick to it because it gets boring. I think it's better to try the lower reps first, at least I'll not give up on that and it's better than nothing

After a few weeks/a month I might try higher reps too. Posture while lifting is quite good I think, I always keep an eye on myself in the mirror. It's the posture while just standing/sitting, that is the biggest problem.