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.