componets page and combobox items

[kalverson]

I have four install types. I setup the first three install types and used the last one "custom" as my fourth install type. I put in some logic to set the selection boxes the way I want them for the third type and last one (custom type) in the .OnSelChange call back. Everything works perfect when selecting the correct install type from the combobox. When on the first two install types, I want to be able to adjust what is selected by clicking on the various checkboxes. However, the second time I do that, the install type is changed to custom which is the one I am using for the last install type. I don't want that to happen. Is there a way to prevent that? I want the install type selected to stay selected when adjusting the checkboxes. Is there a way to just use 4 install types and suppress the custom install type completely.