Nebraska Supreme Court affirms defendant's conviction for driving while intoxicated, fourth offense, over his objection that records of two prior convictions were invalid because the records the State offered to prove the prior offenses lacked file stamp dates. State v. Macek, S-08-1196, 278 Neb. 967 Mark A. Macek appeals his guilty plea and conviction in the Lancaster County District Court for driving under the influence of alcohol, fourth offense, 60-6,197.03 (7). Macek claims that two of his three prior convictions were improperly used to enhance his sentence because they were not final, appealable orders. We affirm the decision of the district court. Macek is making an impermissible collateral attack on his prior DUI convictions and that those prior convictions were properly used for enhancement purposes.