Admin password required to save certain files?

Some of my files are making me require the admin password to modify them. There are just code files that I created in my Documents folder. They are also making me give the password to create files in certain instances. I tried running a repair permissions, but the problem is still there. I'm the only user on this computer, is there something I can do so that it won't make me keep giving the password?

Sound like you will need to change the owner of the document to your account. Do a command I (get info) on the document. At the bottom, click on the detail twisty. If the document is not owned by you. Click on the pad lock and then change to your account. Most likely you will be prompted for the pass word again.

Can I select a folder and have it affect all files within?

It shows system, unknown and everyone for the users who have permissions. When I click the plus sign to add myself, it crashes out.

What is the name of the document that causes the crash?

Every file within the folder does it. I tried changing the folder itself in hopes it would change everything underneath it. I don't know if it makes any difference, but I created it using terminal for a new Rails application I'm working on.

Same here, with all my private files I copied over from my old PC!
Try this:
Go to the Terminal and type

sudo chown -R Yournamedmin /Users/Yourname
If this does not work, try:
sudo chown -R Yourname:staff /Users/Yourname

(the dmin for example, stands for the user group)

and if that does not work as well, see what ls -l tells you about the file.
you can always change read, write and execute permissions with

sudo chmod u=wrx,g=rx
If you don't know what all the different commands mean, then read this:
http://en.wikipedia.org/wiki/Chmod very simple and well explained

Try fiddeling with those permissions and also try "X" = the big X.

That worked, thanks.