Hi Frederic!
Sorry for the late reply, I have been traveling alot the last few weeks
Thanks a lot, glad you like my sculpting.
Do you have a thread here at zbc of your soldier?
For the belts and straps I usually extract them from the underlaying subtools in ZB. You might want to do some retopology afterwards if they are screwed up.
I also create some of them directly in maya by extruding a box along a cv-curve and then refining the strap in zb.
Both ways are good for different situations
After you are happy with the shape just go crazy with alphas or bumpmaps!
For easy things like hatbands and pants-belt the best way is usually to step down to the lowest subdiv level (if you have good topology) and just extract the strap/belt in zb. This way you´ll get a lowpoly belt that fits perfectly.
Hope my chattering was useful hehe
Good luck!