PIC = P1
P U/T = pilot under instruction for a licence or rating. Classed as dual time.
SPIC = Student PIC on integrated courses only. Log as P1 time.
PICUS = P1 U/S = In command under supervision - to be used for skills tests only.
P2 = co-pilot in multi-crew aircraft.
Appendix B to Section A LASORS (Recording of Flight Time) pages 42-44 in the 2007 edition. LASORS is not useless; you just need to find your way around it. If you need to convert your log book times for reason of getting a JAA licence, then you're going to have to get used to LASORS I'm afraid!
Cheers
Whirls