Zirsmiko

Heya! I use an english copy of Windows Vista Home Premium and was wondering if it's possible to somehow change the first day of a calendar week? I know I could just set the Regional Settings to match my country, but it has its own problems so I've just customized the US-english settings to match mine. Just now the start of the week date is set on sunday and it's messing up the default calendar view for me. Any ideas? Maybe some registry tweak would do it?