Hi Kristijan,
I don't understand the real problem. You have a project folder, in there you should have a .llblgenproj and a .net solution (along other folders, including the /packages), right? Something like:
/myproy
   /scripts 
		 ...
   /llblgen
	MyProy.llblgenproj
   /code
	  /dal
		 ...
	  /gui
		 ...
	/packages
	MyProy.sln
	  ...
Normally, your packages folder is relative to your .llblgenproj and your .sln files. Unless you manage your packages in a local central packages repository, which is also configurable. 
Please elaborate more on what is your structure and your dilemma with additional type converters path.