Memory Upgrade

Hi

I have a 13 inch late 2009 MBP with the following specs:

Model Name: MacBook Pro

Model Identifier: MacBookPro5,5

Processor Name: Intel Core 2 Duo

Processor Speed: 2,26 GHz

Number Of Processors: 1

Total Number Of Cores: 2

L2 Cache: 3 MB

Memory: 2 GB

Bus Speed: 1,07 GHz

Boot ROM Version: MBP55.00AC.B03

SMC Version (system): 1.47f2

BANK 0/DIMM0:

Size: 1 GB

Type: DDR3

Speed: 1067 MHz

Status: OK

Manufacturer: 0x80AD

Part Number: 0x484D54313132533642465236432D47372020

Serial Number: 0x19104A65

BANK 1/DIMM0:

Size: 1 GB

Type: DDR3

Speed: 1067 MHz

Status: OK

Manufacturer: 0x80AD

Part Number: 0x484D54313132533642465236432D47372020

Serial Number: 0x2B7056A4

There are two 1GB 1067 chips and I would like to upgrade it to two 2GB therefore giving me four GB RAM.

I cannot get hold of the 1067 chips and I have been told that the 1333 will be ok.

Does anyone have any experience with this or feedback for me?

Much appreciated