Link for help? [newbie mode]

I was wondering if anybody can provide a link for better tutorials about accessory category/creating custom contents? i was in the middle of creating baseball cap designs based on my sketches/drawings and i was planning to add changing colors from the bandana under the worn cap like a hip-hop style (urban) or something (two separated packages). I tried to change the bandana to a necklace type one so that it won't interfere with the cap but no luck every time a custom sim wears the cap its swatch overlaps the texture and color of the bandana. I was totally lost after long hours of sketching and meshing. Thanks in advance for helping.