Help modifying my custom mod?

[LostForWords]

Hi guys, I paid for a custom mod about a year ago and recently requested a further modification to it from the mod creator. He agreed to do so for a small cost (which is paid upon mod completion), however the creator is now not replying to me at all (even though I can see he's online) and thus I can only conclude he is ignoring me.

I shall attach the mod. Essentially what the mod does is create a drop down option in the new posting templates that creates a conditional I can use in the postbit templates. At the moment I have four dropdown options, however I'd like to add a further two BUT I want these extra two to only be viewable/selectable by members of a certain usergroup. I've tried modifying the mod myself and adding in a membergroup conditional but nothing has worked. I've got a slight idea of the coding if you need any assistance and I'd be willing to pay for the work done! Simply message me and we'll talk.