Hi Dave, Sasikanth,
I don't think that will be enough.
If you create a 8-digit scheme referenced to the 11-digit system but don't specify the 8-digit scheme as the standard export scheme for Switzerland the Retransfer program will still try to retransfer the 11-digit scheme.This is because the Retransfer program works on legal regulation level and derives the standard export scheme from the legal regulation.
You will probably need to modify/enhance the Retransfer program and change the numbering scheme. I have no access to a system right now but there should be a form like numbering_scheme_get. Use the implicit enhancement spot at the end of this form to change the numbering scheme.
Regards,
Tim