Windows 7: Excel 2003 - Multiple Excel Open

Hi All,
I don't know if I'm posting in the right area but I really need help.
Before (In XP and Vista), when I have one excel file open and I go to desktop to open a different excel, it would open in the same excel program (2 files in 1 program)
With Windows 7, when I open a different file, it opens another excel program (2 files in 2 excel)
Is there a way to combine the files into one excel?
I was reading through the forum and someone mentioned about Option->Tools->View->Windows in Taskbar but this doesn't work....
Help experts.......because of this, vlookup, etc...are not working....

Thank you.

Dave.

Found the solution....

Create file with:

HKEY_CLASSES_ROOT\Applications\EXCEL.EXE]
[HKEY_CLASSES_ROOT\Applications\EXCEL.EXE\shell]
[HKEY_CLASSES_ROOT\Applications\EXCEL.EXE\shell\open]
@="&open"
[HKEY_CLASSES_ROOT\Applications\EXCEL.EXE\shell\open\command]
@="\"C:\\Program Files\\Microsoft Office\\Office11\\EXCEL.EXE\" /e"
[HKEY_CLASSES_ROOT\Applications\EXCEL.EXE\shell\open\ddeexec]
@="[open(\"%1\")]"
[HKEY_CLASSES_ROOT\Applications\EXCEL.EXE\shell\open\ddeexec\application]
@="Excel"
[HKEY_CLASSES_ROOT\Applications\EXCEL.EXE\shell\open\ddeexec\topic]
@="System"

save file as name.reg (not name.reg.txt)

run file and done.