I don't use OpenOffice, but StarOffice. The idea is the
same.
Where did you install it? Forgot?

Ok.
run terminal
locate OpenOffice
or find it in file manager
in X
right-click on taskbar> add to panel> applications>
point to your app> ok
First place you should go to is Suse website. I'm sure
they have doc's.
2nd place is openoffice.org documentation.
Lastly, what you did is manual install and it won't show
up anywhere in X. If you want, you have to have the distro
CD and install from there. It'll show up.