> I'll add a wrapper which will simplify that in the 
future ; 
> that is, just after (line 810) the 'save' initialization, 
> an optional handler to modify it.

Darn, this wrapper already exists.. I should sleep more :)

htswrap_add("save-name",httrack_wrapper_savename);

typedef int   (* t_hts_htmlcheck_savename)(char* 
adr_complete,char* fil_complete,char* referer_adr,char* 
referer_fil,char* save);