Hi Brooke,
I found the following at <A HREF="http://members.aol.com/axcel216/">AXCEL216's MAX Speeed WinDOwS Tricks Secrets Bugs Fixes</A> :
To get Notepad to maximize upon startup, create a batch file with this line:
@START.EXE /MAX %windir%\NOTEPAD.EXE
This will start a DOS box and then Notepad. Call the batch NOTEMAX.BAT or whatever you like.
Actually you should right-click on the BATch file's shorcut (PIF = MS-DOS Program Information File), place a check mark in the "Close on exit" box under the Programs tab, and make sure you run it Minimized.

Last step: associate your .INI and .TXT files with NOTEMAX.BAT.
You can do this by editing the Registry. Run Regedit and go to these keys:
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\inifile\shell\open\command
@="%windir%\\NOTEPAD.EXE /n \"%1"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\txtfile\shell\open\command
@="\"%windir%\\NOTEPAD.EXE\" \"%1\""
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Applications\Notepad.exe\shell\edit\command
@="%windir%\\NOTEPAD.EXE %1"
Replace all NOTEPAD.EXE instances under the "(Default)" String Values with NOTEMAX.BAT, and make sure to type in the full path to your BAT file.
Close Regedit when done."
Good luck,