Hi @MG18, I believe below problem would have been solved now.
If not, you can use this information. Actually, the queries raised in below question are too basic. If you go through any AML scenario in Party Header & Account Header you will find similar in nature specially scenarios SAS10005, SAS10006 etc. Try to go through those scenarios. You can create a copy of existing scenario and modify the logic / parameters as per your need.
You should access scenarios form Scenario Administrator, this can be used to create a new scenario as well. Parameters and codes can be decided as per your business rules. It can be tested either directly from Scenario Administrator using test (Run) button or using steps of AGP. You should try to test syntax of your codes directly from Scenario Administrator the for alerts you can try running Codegen files from SAS EG.
Hope this will be helpful. Feel free to comment in case of any further query. You can refer to AML guide where most of your basic queries will be answered.