I am not even sure if it will work when installing with the administrative image of AdminStudio. Since you didn't mention the version of AdminStudio used, so what I am going to say may not be applicable. Some vesions of AdminStudio use nested installation to install Developer/DevStudio (my memory is kinda fuzzy, and I didn't verify AdminStudio 6), and administrative installation cannot contain a nested installation, as indicated in
Nested Installation Actions.
If you just want to run Repackager on a machine that doesn't have AdminStudio installed, you should look into
Launching Repackager Remotely in AdminStudio Help.