Can my 2009 MBP run Lion?

Question

Without lag or problems of course. Here are my specs:
Model Identifier:          MacBookPro5,4
  Processor Name:          Intel Core 2 Duo
  Processor Speed:          2.53 GHz
  Number Of Processors:          1
  Total Number Of Cores:          2
  L2 Cache:          3 MB
  Memory:          4 GB
  Bus Speed:          1.07 GHz
NVIDIA GeForce 9400M:
  Chipset Model:  NVIDIA GeForce 9400M
  Type:              GPU
  Bus:               PCI
  VRAM (Total):   256 MB

Answer 1

Upgradingto OS X 10.7 FAQ
First,you need to make sure you're running the latest version ofSnowLeopard 10.6.8
Clickthe "Apple" symbol in the top left corner of your screenand select "About This Mac."
Makesure you're running version 10.6.8.
Ifnot, click "Software Update" from the same Apple menu andupdate your system.
Thenwhen that's finished launch the MacAppStore from the same menu.
You'llsee the giant Lion banner across the top. Click on it.
Thisbrings you to the app page for Lion. It costs $29.99 -- click theprice, then click "Buy App."
FreeLion? check here
http://www.apple.com/macosx/uptodate/
You'llbe prompted to sign in with your iTunes ID. After that, yourdownload/upgrade begins.
BackupLion
http://www.eggfreckles.net/tech/burning-a-lion-boot-disc/
http://eggfreckles.net/tech/installing-lion-clean/
Check Apple's license details throughly before usingorinstalling Lion.
This is what binds you legally, notwhat users say or sites suggest you can do.
OtherLion FAQ's answered.
No"Rosetta" sorry. 
Someof your older programs (like Appleworks) that depend upon it will notwork.
OSXLion cannot be installed on these Macs:
1:Any PowerPC processor Mac (G3, G4, G5)
2:Any Intel Mac on this list:
iMac4,1Early(Jan-Sept) 2006 17"
iMac4,1Early(Jan-Sept) 2006 20"
iMac4,2Mid(July-Sept) 2006 17"
MacMini1,1(Feb-Sept) Early 2006
MacMini1,1(Sept-Aug) Late 2006
MacBook1,113"(May-Nov 2006)
MacBookPro1,115" A1150 (Jan-May 2006)
MacBookPro1,217" A1151 (Aprl-Oct 2006)
MacBookPro1,115" A1175 (May-Oct 2006)
Lookunder the Apple Menu > About this Mac > More informationforyourmachine details.
(thereare reports of hacking Lion to work on 32 bit Intel Core DuoMac's,it's unsupported by Apple and not advised)
Didn'tget Lion?
Theseare user to user support forums and Apple doesn't respond here,
Weusers can't speak for Apple about your free Lion status or problemsdownloading, reissuing a download.
It'spossible Apple could be spacing out the downloads as not to knock theservers offline. So be patient.
Ifafter a week or so when the initial rush is over, and you stillhaven't gotten your Lion, I suggest you contact Apple.
Missioncritical
Ifyour using Mac's in a mission critical type environment or have thirdparty hardware or software you must rely upon working correctly. It'sadvised to wait until all the bugs, driver updates, third partysoftware and other issues are resolved before upgrading. This mighttake several months. Then if you do so, do one machine at a time andcarefully test everything before full deployment.