Hi Gross,
There are several methods to do that.
FIRST METHOD is like ATLARSON said to create a pararameter in each part and drive the BOM TABLE with the parameter &asm.mbr.part_number or whathever. But the main incovenient is that if you realized at the end of your project you need to use this parameter, you must assign this parameter to all your parts from assembly, or to modify you format table (create another repeat region able to use this parameter assigned on part in question only)
THE SECOND METHOD is to create a parameter let's say "qty" (derived from quantity) and to use it in your table region. The qty must be created in drawing mode. The advantage of using this method is that you modify only the BOM table of the specified drawing only and not the parts or assemblies. You can use this parameter in this way:
Choose TABLE -> REPEAT REGION -> RELATIONS -> click on your BOM -> EDIT ->
IF asm_mbr_name == "your part name here"
qty == 2 (or quantity you need to see)
else
qty = rpt_qty
endif
In this way you can control the quantity of items in your BOM.
IMPORTANT: Now, your table will show both parts (one with qty of 2 and the other with a qty of 1). But you don't need the second one. You will need to exclude from the table:
TABLE -> REPEAT REGION -> FILTERS -> click on table -> BY ITEM -> EXCLUDE -> click on the part you want to exclude.
THIRD METHOD:
Go to ASSEMBLY mode, and choose: COMPONENT -> ADV UTILS -> INCLUDE -> choose your part that you want to be in a qty of 2. Now the part will be part of you assemby, but you are not able to see it.
Go back to your drawing mode and regenarate the drawing. You will see a qty of 2 for the part in question. It will rest only to exclude the second part from the table (see method 2). That's all. It's fast, clean and works well.
Good luck!