I played Mass Effect 1 and deleted the saved data and now I want to play the second game but I don't want to play with the default choices. Is there anything I can do to edit those default choices?
When you start a new game in Mass Effect 2 without importing a save file from Mass Effect 1, a variety of default options are chosen to choices that could be made in Mass Effect 1. There is no way to change these choices in Mass Effect 2 however, it is possible to create a Mass Effect 2 save and then use an external editor to change the default choices.
In order to do this you will need to do the following:
Start a new game and create a new character (don't import)
Play through the introduction level and the initial cutscenes until you "wake up" and are able to save your game. Save and exit the game
Download and open Gibbed's Mass Effect 2 Save Editor
Open the save file that you just created
Under the "Player" tab within the "Plot" tab - tick the "Played Mass Effect 1" option
Go to the "Plot" tab to change any of the other options you want
Ensure that "End Game State" under the "Plot" section on the "Raw" tab is set to an option that is not "NotFinished" (ie: "LivedToFightAgain" or "OutInABlazeOfGlory")
Save the edited file ensuring you stick with Mass Effect 2's naming convention (Autosave.pcsav, Quicksave.pcsav, Save_000#.pcsav, etc)
Open Mass Effect 2, start a new game and select Import Mass Effect 2 Character, choose the file you saved and play...
Short answer: No
Long answer: Still no, but you could to get access to Mass Effect 1 save file and modifying it to get galaxy with choices you want. However, there is no way to adjust the galaxy in the game without a save file. It will always default to certain options.