Thank you for making the different bodyshapes. The variety is wonderful, and I'm glad you haven't made any of them defaults, because as you have said many times, it defeats the whole purpose of creating them in the first place not to mention the enormous amount of work. And besides that if you did it for one shape you would have to do it for all of them because everyone would want something different.
Did you check to make sure your custom content is enabled? I noticed the last time I added an expansion pack that it got reset to the default of being disabled.
From the neighborhood screen that the house is in click rhe house like you would if you were going to play it. In the pop up box where you click to enter the lot on the left side there are a couple of buttons. one says package lot. Click it, it will give you 2 choices, package lot to file or the exchange. Choose package to file. Let it do its thing and it will tell you that it placed the file in your packaged lots file. It's one of the sub-directories under your Sims2 folder. Exit the game and run the sims2pack file ans it will place it in your games houses bin. Now you can place it where ever you want. At least this is the way I do it.