Open it "normally", then drag-and-drop the newly created tab between the other tabs in the position you want.
Additionally, if you have multiple files arranged in tabs and you group (and save) them as a project, the order of the tabs (whichever way you set it by drag-dropping the tabs) will be remembered in the project. -- <http://forum.pspad.com/read.php?2,53349,53516> PSPad freeware editor http://www.pspad.com
