[SGII] Independant Figures as heros

Hi,
    Ok, I have a question, which may have been addressed at some other
time.
Let's say we are going to do a WH40K conversion into SGII.  In so doing
we
have several unit types with their appropriate abilities (Morale,
leadership, fire power, etc.) which all converts easily.  Then we throw
in
the unit leaders or character types.

    Example:  A force of 4 Blood Angle berserks being led by a chaplain.
Now the berserks convert pretty easily, but then how would the unit
leader
add in his 'special' abilities to the group's over all effectiveness? 
For
sake of this example, I will assign the unit a training level or
veteran,
with a combined firepower or a D8 and no support weapons.  So when
combat
ensues, we roll our happy dice of D10 and, D8.	The target rolls the
range
die.  Remember this is an example only and does not reflect any type of
actual conversion.

    1. Would the leader add in an additional die [added die option] like
a
support weapon (die type depending on type of weapon/character/ability
of
course), or
    2. would the presence of the leader only modify the unit's overall
ability such as adding or subtracting a 'value' [ plus option ] to the
total
(i.e. +1, +2, etc)?
    3. Would the plus/minus options throw off the relative possibilities
of
the opposed rolling system used in SGII or would it only enhance the
options?
    4. How would the leader type be used if not leading a unit, but
rather
worked as an independent figure?
    5. If the added die option is used, then what would then happen if
the
unit had a support weapon as well?  The number of dice being thrown may
offset the realistic chances of a two or three-to-one die odds ratio of
beating the opponent with two dice...
    6. Is the plus option just as bad?

Scott Spieker