Avi,
There are many compicated steps that must be taken to use LoadRunner to create scripts that will test ALM. The process is something that requires what is called the "Benchmark Toolkit" which is now owned by HP Professional Services. Please contact your HP Sales Person to arrange for them to arrange for PSO to discuss how the toolkit works and how they will be able to assist you with this process.
If HP PSO is not the way you want to go, you can browse through numerous conversations here in the fourms or you can look for some 3rd party option like the product you can find details on here: http://www.rextencytech.com/almqctesting.php.
Just be aware that third party options will cost some money as will HP PSO
Good luck.
Craig Drummond