Sony Vaio PCG R505GL upgrades

[saprofagus]

I want to find out about some possibilities to upgrade RAM and Hard Drive. I did a little of research on internet and:

1- Sony allow only up to 384MB (128 installed plus up to 256MB removable) of Ram where specification for motherboard stayed 512MB. I know some people did upgrade to 640MB (128 plus 512) and they claim is working...

2-What is the maximum allowable HDD for this system. Is there any limit how big HDD I can install?

Thank's for help.

[Brawser]

Main Chipset Intel 830MG
System Bus/FSB 133 MHz
BIOS Size/Name Inside Plug and Play (1.0a) 1x 256KB Flash ROM
Processor
Processor Make/Class Intel Celeron Mobile
Socket Type/Spec microFC-PGA/S478
Processor Speed(s) 1.20 GHz
Cache (L1/L2) 512 KB / 128 KB processor based
Video and Graphics
Video Memory/Type Integrated
Video Architecture/Chipset Intel 830MG
Built-in PC Camera N/A
Display
LCD size/type/resolution 12.1" XGA 1024x768 TFT
Memory
Maximum RAM/# of sockets 512 MB; 2 sockets
RAM Type/Spec/Pinout PC-133, 144-pin, SODIMM 3.3V
RAM Configuration(s) 512, 256, 128 MB
Storage
Hard Drives: total # ; max capacity/rpm 40 GB, 2.5-inch
1st HDD: Max capacity/height/interface 40, 30, 20 GB; 2.5-inch; 9.5mm ATA33/66/100

AND PCGA-BP4R (up to 6h) battery pack upgrade

[Believer]

I upgraded my RAM with INFINEON 512MB pc133 64Mx64 SDRAM
System boot up with no problem and recognise it plus 128MB on board so I have 640MB up and running.
I run some test and it looks impresive! It's accualy use 640MB and I don't know how but I'm love it!