For your psoas, I suggest you do the protocol that I post here on the forum. You'll need my book Treat Yourself to Pain-Free Living. The treatments are really easy, but it is important for them to be done in this order:

T is Treatment. S is Stretch.

1. quadriceps (just the treatment, not the stretch yet) (T-138) (S-139)
2. tensor fascia lata and gluteus minimus (hip) (T-133/135) (S-134)
3. piriformis (butt - actually, all the muscles that originate on your sacrum, but as you treat this one you'll be getting the others) both the treatment and the stretch. (T-129) (S-131)
4. gluteus maximus – continue along the same line as the piriformis treatment above. The gluteus maximus is just posterior to the piriformis.
5. erector spinae (long muscle of your back, be sure you don't press on your spine), just the treatment for now. (T-108) (S-104)
6. quadratus lumborum (low back - you'll treat this at the end of the erector spinae treatment) (T-121) (S-122)
7. go along the top of your posterior pelvis to treat the insertion of the quadratus lumborum and the gluteus maximus muscles (Chart10)
8. iliopsoas stretch (be sure your knee is pointing toward the ground and that the bent knee is further back than the standing leg) (S-125)
9. treatment and stretch for the erector spinae, which will also treat the quadratus lumborum (T-108) (S-104)
10. quadratus lumborum stretch (T-121) (S-122)
11. quadriceps again, this time do the treatment and the stretch (T-138) (S-139)
12. hamstring treatment and stretch (T-138) (S-139)
13. iliopsoas stretch again (S-125)

I look forward to hearing from you.

wishing you well,
Julie