I'm looking for advice on how to try and help a good friend of mine who has been suffering from BPD the past 7 years (it was first diagnosed around 12-13, he's 19 now).

He's had real trouble in school, his only friend being his girlfriend he shared a symbiotic borderline-relationship with. When they broke up he lost his entire circle of friends and basically went to school without talking to anybody. Most of the times he'd show up drunk or not at all, it's a miracle he didn't flunk. 
Well, he did manage to graduate somehow, he even found a couple friends, but his horrible history with school has evoked an IMMENSE workplace-phobia.
His borderline behavior he's learned to deal with, and he does seek help (been in constant therapy ever since his diagnosis), but his inability to work is immensely crippling. 
He's been attending an open unit for the past 3 weeks, but its therapy is not yielding the hoped-for results. The staff don't seem to understand his main problem (the workplace-phobia) and instead focus on other, unrelated issues and disorders, which they usually try to treat with medication, which has been a major problem of his in the past. At this point he's only going there to try and get used to a regular sleep-pattern and work-like day. 
I can't stand to see him suffer the way he does, but everytime he opens up and tells me about his concerns I'm at a loss. Initially I gave him the whole "positive thinking" treatment, having no prior experience in mental disorders, but ever since I started researching BPD (and the general field of mental disorders) I completely withdrew from any kind of advice-giving role, as I feel I'm not qualified.

He's been working a minimum-wage call-center job the past 4 years (on a hiatus now, as he's attending the open unit), and he's planning to start working there again after the three-month therapy. 
I fear his anxiety-problems come from his experiences in school (being a major outcast there and at home), and he's reliving similar patterns at the job. I feel a change of scenery, any other job, might help him on his remission, but he doesn't want to give up a secure, livable position for an experiment.

He falls into major depression every time his job and the responsibilities that come along with it (e.g. not being able to be with friends, having to go to bed earlier - his regular bed-time falls somewhere around 7AM) start interfering with his habits.

I proposed applying to jobs, working for a day or two until the depression sets in, and quitting, just to get used to this kind of lifestyle, but I don't know if that's good advice. 
The thing I'm most afraid of is stagnation, which I think is inevitable, if he doesn't try facing his phobia.

If anyone knows anybody who, or has been in a similar situation himself, please share your advice. I don't know who else to turn to.

Edit: After a bit of research, ergophobia seems to be exactly the condition he has.