Not all IFR helicopters are multi engine aircraft. The Bell206 is a single engine helicopter that can be certified as IFR heli with certain equipment installed.
However JAR-OPS does not authorize single engine IFR transport category helicopters but that is a different story and not applicable to your question.
So, yes you can do your IR rating on a single engine helicopter as long as it has been tested and certified as per the manufacturer type data sheet. Which as far as I know is only applicable to Bell 206 helicopters in Europe.
No you can not complete your training on a IFR equipped R-22 but some flight schools can provide some of the training on R-22 and then the last 10hrs + checkride in IFR B206.
I can provide you with links to schools in Scandinavia that offer SE IFR training.
Last edited by Aesir; 8th November 2006 at 19:16.
Reason: link to schools