Hi leotikansas,

I don't think that a script is really necesarry as Maya contains very good selection tools already.

One option would be to try the quick select function. At the top right of the interface is a text field, this is multi function and to the left of it there is an arrow which will open a drop down menu from which you can selet it's function, quick select is one of them. Providing you've named everything sensibly selecting objects and joints shouldn't be a problem with this tool, just type in the name and your off.

Also the Outliner window is a great tool to use when you're skinning your models, the visual heirarchy is quick and simple to follow but once again this is providing all your objects are named sensibly.

Take it easy,

Mat.