Convert Ts2 accessories to Ts4

I don't want to make a whole tutorial, but I'll give you some general guidance.

I find that converting Sims 2 clothing is a lot like converting Sims Medieval clothing.

1) Download SimPE.
2) Use SimPE to open packages found in any given pack's \TSData\Res\3D files. Example: Sims07.package. I never remember which pack contains what, so you have to open them until you find both the geometry data and the textures.
3) Extracting Geometry for this is the same as extracting it for objects. It's just a LOT more annoying to find anything.

From there you can import it into Blender and make whatever adjustments you need to.