If OpenSUSE doesn’t support your Epson printer out of the box, you can install the printer driver provided by Epson. The step-by-step tutorial which guides you trough the installation process is here.
You have installed ArahWeave, now you can not find it in the menu.
If you have installed it properly, you should have three new icons on your desktop, ArahDrape, ArahWeave and ArahPaint. To add them to the menu, follow these instruction.