Also for those who wish there could be more hull type in the game, i found an easy way if you dont like desining yourself. Starfarer forum has a lot of nice ship sprite from mods you could easily borrow and get in game in matter of a few minutes.
1. Find a mod with a ship you like in and download.
2. Go inside graphic ships and extract the image you want or all of them in a separate folder.
3. Download and install gimp if you dont have it.
http://www.gimp.org/downloads/4. Open up the image you want with gimp, select the bucket tool.
5. Select the bucket tool and set the color to 160 160 160 RGB, (it will become the clean slate you can design uppon.
6. Set the threshold to 255 and the *Fill similar color*
7. Click on the ship it will make it all grey.
8. Go in Image->Canvas Size and increase both number by about 40 and then click center to center up the ship in the alpha panel ( Do it only if there is not enough alpha around the ship since thats where you place shield in the game, if it isnt there, you wont be able to place shields around your ship. )
9. Go in File-> Export and make sure to select the PNG extension and rename it to *somethinglikethatBot* the Bot at the end is very important.
Now open the original again and do the step 9 but change the Bot for Top.
Once its all done open up the game and create a new ship and select any kind of hull it doesnt matter and give it the name you choose without the Top or Bot. Exit the game once complete.
Navigate to the game root folder and go in profile then name of your ship. Change both image there with the image your edited previously.
Fire the game and enjoy your new hull type!