Please Backup your data+SQL+members photo before doing the things below.
2.0-2.1 just upgrade it as an admin in admin's area.

1.3.0---2.0
If you have download friendfinder1.3.0
Upgrade 
Run http://yourdomain.com/modules.php?name=FriendFinder&file=upgrade
then delete upgrade.php and savedata.php and install-friendfinder.php


1.2.x---1.3.0
if you have download friendfinder1.2.x
upgrade 122-130:
simply insert these two tables in upgrade into your database
edit ffconfig.php
upload all files.

1.1---1.2
If you want to use 2.0 .
drop table nuke_user_photo insert the new nuke_user_photo
add this rows in table nuke_user_profile1 between oicq and location 
     selfintro  varchar(255)     NULL    
   stapro  varchar(50)    NULL   
   city  varchar(50)    NULL     
   postcode  varchar(50)    NULL  
then add approved  tinyint(1)   NULL at the end of   nuke_user_profile1 

that's all.If you still have questions ,fell free to ask me on the forums of  http://syber.hk.st 