Hard drive upgrade help on HP compaq 6910p

[tian105]

the laptop currently has a 80gb 5400 drive which it's hard drive interface is 1 x 7-pin Serial ATA/150 Serial ATA
Seagate Momentus 5400.3 2.5IN 80GB SATA 5400RPM 8MB Notebook Hard Drive OEM - DirectCanada
i want to upgrade it to 320gb 7200 drive which it's hard drive interface is 1 x 7-pin Serial ATA/300 Serial ATA Newegg.com - Western Digital Scorpio Black WD3200BEKT 320GB 7200 RPM 16MB Cache 2.5" SATA 3.0Gb/s Internal Notebook Hard Drive -Bare Drive

any advice on that? will it fit well?

also is it possible to upgrade the graphic somehow is there extra room for another card? cuz years ago they had a option to choose to have ati x2300 i think. now it's running on intel GM 965 chipset graphics.

other than that the laptop is running on win7 32bit ultimate 4gb of ram and t7300 duo core at 2GHz.

P.S will Newegg.com - D-Link DWA-652 Xtreme N Notebook Adapter fit in my laptop since my router on the desktop D-Link DGL-4500 IEEE extream N and will i notice a boost in terms of speed or lag?

thanx in advance

[osprey4]

SATA should be backward compatible, so an SATA II drive will work in an SATA I system.

You CANNOT upgrade integrated graphics.

A wireless N adapter will only work if you have a wireless N router.