PHP5.3 support how to

Hello all,
I'm trying to  add the php 5.3 namespace support in doxygen and thought I 
would just hit the mailing list to make sure that I am understanding correctly 
what I need to do. 

>From what I understand it uses flex / yacc (bison?) to parse the source code in 
scanner.l ? This generates some C code that which executes a function when it 
encounters one of the tokens. 

I  can see the token declaration  that are in scanner.l which i need to create 
however I am having some difficulty finding the CopyPHPString() which I think is 
the function i need to modify in order for it to handle the namespace 
declaration. 

Would appreciate any advice / direction / input. I haven't worked with flex / 
yacc nor really done that much C before so apologies if what I am asking seems 
obvious. 

thanks in advance
Andrew

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