The normal scenario starts by selecting the scripts that 
you want to run, you can run multiple scripts 
simultaneously. Then select the total number of user for 
which you want to run the scenario. The users are divided 
equally between the scripts by default. e.g. If there are 
four scripts and 100 users. The default load will be 25% 
each, so 25 users for each script. You can change the load 
as you want, like you can run 30% users for 2 scripts, 25% 
for third and 15% for the rest. Then you need to select the 
Load Generators on which you are generating the loads. 
Select from the list and connect to all to make them ready. 
Once you have created scenario you need to set up schedule. 
Load Runner provides options to run all the Vusers 
simultaneously or define a ramp up - ramp down time. Ramp 
Up means you are gradually increasing the load. You specify 
how many users at a specified time interval. Than in 
Duration specify for how much time you want to run the 
script with all the users up. The duration does NOT include 
the Ramp up and Ramp down time. After defining scenario, 
you are done. Just click "Run" to start execution.