Tom,
as Korrigan told you, in the original release for the 4.09 it is explained. But it's even more detailed in the readme of the MOD. I suggest you to read in depth that.
Your problem has been reported by many, and arises from the fact of having less than 1280x1024 screen resolution. This is a problem on how the IL-2 shows the comboboxes and the fact that we are using higher resolutions that the original maximum thought by the developers.
So I had to add those lines of configuration. Here is the original reference Korrigan said:
Thanks for your coments Dakpilot.
The problem you have is the result of the different screen resolutions and visual each installation of the IL-2 has. I suggest you to go to the thread of my original QMBPro where many have discussed and explained how to solve it.
In the ReadMe of the QMBPro you will find that are settings for each combobox. You have to go to the [Mods] section of your Conf.ini (and if you don't have a section like this you have to create it) and add a line like:
PALQMBLinesPl0=30
30 is the default value (the one which is causing you the troubles). There is no more straight way to solve it than testing different values until one of them doesn't produce anymore the effect. I suggest you to try with 24 instead of 30.
Regards,
Pablo