I've no idea how to update oQueue. I also downloaded icebox but I've no idea how it works. I don't know in which file I need to place it etc. Someone please give me a proper explanation. ;)

Just open up icebox from wherever it downloaded to. You'll see a window with 4 buttons up the top (refresh, update all, update, uninstall). Underneath that will be a list with 4 items (icebox, oMail, oMouse, oQueue). Click the tick box to the left of "oQueue" and then click the "update" button up the top.

I just redownloaded oQueue. Because icebox doesn't seem to work for me. WHenever I try to open it it says error can't open because of missing file X.