Did you ever find a solution to this? I am in the same position on a 2001 740iL with mk3 and v16 software. Tried to update to v26 and it asks for a v17 or cdkey and I've tried burning both form links found on this forum. Both are not being accepted. Any ideas?

Thanks in advance!

Panos
2001 740iL
2002 M5
1999 540i.6 (for sale)
1997 540iA (totalled)
1994 540ia (sold)