I would like to emphasize to every developer, that commercial exploit of any software that derives, requires and/or makes use of software by Take Two Interactive Software, Inc., is a violation of the End User License Agreement License Conditions (EULA for short). You agree to these conditions when installing GTA IV or any of the available Downloadable Content (DLC).
Take Two Interactive Software, Inc states under LICENSE CONDITIONS :
You agree not to:
Commercially exploit the Software;
USER CREATED CONTENT: The Software may allow you to create content, including but not limited to a gameplay map, a scenario, screenshot of a car design or a video of your game play. In exchange for use of the Software, and to the extent that your contributions through use of the Software give rise to any copyright interest, you hereby grant Licensor an exclusive, perpetual, irrevocable, fully transferable and sub-licensable worldwide right and license to use your contributions in any way and for any purpose in connection with the Software and related goods and services, including the rights to reproduce, copy, adapt, modify, perform, display, publish, broadcast, transmit, or otherwise communicate to the public by any means whether now known or unknown and distribute your contributions without any further notice or compensation to you of any kind for the whole duration of protection granted to intellectual property rights by applicable laws and international conventions. You hereby waive any moral rights of paternity, publication, reputation, or attribution with respect to Licensorís and other playersí use and enjoyment of such assets in connection with the Software and related goods and services under applicable law. This license grant to Licensor, and the above waiver of any applicable moral rights, survives any termination of this License.
Please read carefully the above conditions, and note that most mods require violation of software protection, hence a violation of the EULA in question too. Although it is not completely illegal to create script mods for GTA IV, it is illegal to commercially make use of any modification independently from the creator. As all modifications for GTA IV are indirectly granted an exclusive license to Take Two Interactive Software, Inc you don't hold the right to sell it. In court, a good lawyer can state you are producing allowed user created content that happens to require protection violation and get away with it, but not if you are making money out of it.
Rockstar Games is very nice to the modding community because they know it makes their game sell for a longer period, so be nice to them as well and don't sell mods and/or mod development.
I would like to ask respect for me and others when replying to this post, there will be very different opinions on this matter, so don't hate each other because of that, rather respect everyone's will.
Sure of everyone's comprehension and without any more subject on this matter.