Importing partial dump over full dump

Dear All,

Am using

1. SQL> select * from v$version; 
2. BANNER 
3. ---------------------------------------------------------------- 
4. Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Prod 
5. PL/SQL Release 10.2.0.1.0 - Production 
6. CORE    10.2.0.1.0      Production 
7. TNS for 32-bit Windows: Version 10.2.0.1.0 - Production 
8. NLSRTL Version 10.2.0.1.0 - Production 

I have requirement that Due to huge size and time taking more than 8 hours to take dump using expdp.So I plan to take full on week end and partial dump that is (few tables have been partition into 3 parts which has more 2 GB  such part1,part2,part3. Part3 always have latest data(maxvalue) . I Used to backup of all tables(non partition tables) with part3 partition table data's.