I believe you said in your other thread that you're using WF5 (I'm not too sure if this feature was added in), but there is a pre-load for solid elements.
If this feature isn't in WF5, then you could make your fastener out of beams and links (or solid elements) and use a temperature load to cause the fastener to go through thermal contraction. This will be an iterative process to ensure that you've got the correct pre-load (just like with the fastener tool). Make sure that you restrict the thermal load to just the fastener (you don't want the result of the model to contract), or define a material property on the rest of your system that has a zero coefficient of thermal expansion.