Blackburn Rovers have got the expensive players, the plush stands and the moneybags. Now they are setting about dispelling the theory that they lack glitter on the pitch to go with the pots of gold.

The first division play-off hopefuls are through to the fifth round after blitzing Derby with five second-half goals. Before most of the Blackburn players had even worked up a bead of sweat Derby had manoeuvred an opening goal which stemmed from a dubious foul, awarded for Garry Flitcroft's challenge on Stefano Eranio.

The Blackburn defence was guilty of some dreadful dithering and Chris Riggott timed his run to head Craig Burley's freekick beyond Brad Friedel.

Before the midway point of the first half the tie could conceivably have been all but over, but Malcolm Christie came a poor second in two one-on-ones with Friedel.

However, Graeme Souness's side grasped the initiative only three minutes after the re-start.

Marcus Bent flicked a loose ball into the six-yard area and Flitcroft headedinside Andy Oakes's near post.

Eight minutes later Dunn worked the ball superbly to Jason McAteer and Bent emphatically headed his precise centre past Oakes to set up the prospect of an all-Lancashire affair at Bolton on Saturday week.

On 63 minutes that was all but guaranteed. Riggott tripped Alan Mahon in the area and Dunn sent Oakes the wrong way from the penalty spot.

Eranio converted a cross from the substitute Lee Morris on 70 minutes to give Derby renewed hope, but straight from the restart Damien Duff crossed from the left and Bent knocked in his second of the night.

By the time the substitute Matt Jansen stroked in Blackburn's fifth on 76 minutes most of the Derby fans were leaving.

An 88th-minute goal from Scott Murray cruelly ended Kingstonian's FA Cup dream at Kingsmeadow. The Bristol City midfielder scored from a narrow angle to set up a fifth-round meeting with Premiership Leicester.

DERBY: Oakes, O'Neil, Riggott, Carbonari (Morris 68), West, Boertien, Eranio (Higginbotham 84), Burley (Martin 59), Murray, Burton, Christie. Subs Not Used: Bragstad, Grant. Booked: West, Burton. Goals: Riggott 3, Eranio 70.

BLACKBURN: Friedel, Curtis, Berg, Taylor, Duff, McAteer (Keller 87), Dunn, Flitcroft, Mahon, Hughes (Jansen 73), Bent (Hignett 82). Subs Not Used: Filan, Short. Booked: Flitcroft, Dunn. Goals: Flitcroft 48, Bent 57, Dunn 65 ????pen, Bent 71, Jansen 77. Att: 15,203

Referee: R Pearson (Peterlee).