number for blowfish algorithm

[Werner Koch]

I use a value of 42 for Blowfish with 160 bit; OpenPGP only defines Blowfish
with 128 bit key.  I asked Lutz Donnerhacke, wether it is possible to add
a new constant for this, but he said no.

So what can I do?  Use a value from 100-110 which are reserved for
experimental algorithms or just continue with 42?  

Any opinions wether the way PGP modifies CFB mode really enhances security?
I couldn't find any positive answer to this in literature.
 

-- 
Werner Koch, Duesseldorf  -   werner.koch at guug.de   -  PGP keyID: 0C9857A5