I've done a previous pair of tutorials on keeping bones when converting items between figures, as for instance between Genesis and Genesis 2. That method takes a few steps and an obj export/import. This way is faster, although it doesn't work well with Generation 4 conversion.
You will need:
-The figure you want to convert TO.
-The piece of clothing or hair you want to convert.
-Any relevant clones. For e.g., you will need to purchase the Michael 4 for Genesis 2 Male and/or Victoria 4 for Genesis 2 Female to convert items between Gen 4 and Genesis 2.
Load the figure.
Load the item of clothing. Cancel Autofit if it is triggered.
Start the Transfer Utility. Its icon looks like an arrow pointing up and right.