I've no strong affiliation with any Buddhist sect at present; I'm studying Gelug Buddhism because the Jamyang centre runs an in-depth two year foundation correspondence course which sounded attractive, (family, work and financial restraints - at present - restrict me to this form of study), and so far it's very good and I'm finding it quite challenging. I guess my commitment will be to Gelug Buddhism, since that's what I'm studying.
As for whatever text I practise Lam Rim from, well maybe it's good I read a few different texts? As I said earlier, after this course, I could do another two-year course in Lam Rim Chen Mo; and because I think Lam Rim is an extremely clever way of learning/practising Buddhism and further developing that 'internal change' that I'm after; I may do this. But while I'm doing this course, I'd prefer a simpler Lam Rim text - I've lots of study already on my plate and I've a family, work, and A.A. commitments.
Anyway, thanks for your replies guys, I did read them them briefly before they were deleted; and as always, I try to keep an open mind.
And now I'm late!