Steve Carr and Gary Doherty were in the Irish line-up as goals from Kevin Kilbane and Clinton Morrison secured a 2-0 win at Hampden Park. Neil Sullivan played in goal in the first half for Scotland.
Ledley King was part of a bright second half display from the a young side including as England crashed 3-1 against Australia at Upton Park.
The stylish defender earned his second full cap as the second half finished 1-1 - but the damage had been done by a 2-0 half-time deficit.
Simon Davies helped Wales set a new record of nine unbeaten matches but it took a late John Hartson goal to force a 2-2 draw against Bosnia at the Millennium Stadium.
The best news for Wales arguably came before the match when Goran Bunjevcevic's Yugoslavia - the country now named Serbia & Montenegro - were held to a 2-2 draw by Azerbaijan in Euro 2004 Group Nine. Wales top that qualifying group.
Milenko Acimovic had a night to forget as his Slovenia team were hammered 5-1 by Switzerland.
Steffen Iversen's Norway lost 1-0 in rain-lashed Greece while Lars Hirschfeld's Canada enjoyed a 4-2 win in Libya.
Chris Hughton got off to a flying start in his new role as Ireland's assistant manager against Scotland on Wednesday night.