I was wondering whether there is any sense in using the {-chuqmoH}, and if yes, then how is it to be used ?

For example, lets say we place the {-chuqmoH} on a be-verb. If we write {pImchuqmoH} then does this mean "they made each other different" ?

And could we write {romuluSngan DIpImchuqmoH} for "we made the romulans different to each other" ?

On the other hand, if we placed the {-chuqmoH} on a verb which takes an object, then would the following be correct ?

{romuluSngan DIleghchuqmoH} for "we made the romulans see each other" ?

-chuq doesn't allow the use of an object, since the plural subject is also the verb's object.

pImchuqmoH is just fine for they made each other different. You can get a clearer feeling for the effect of -chuq + -moH with a more active verb: HIvchuqmoH they cause each other to attack. But you can't just stick the target of their attacks in the object position, because this is a reflexive verb. You have to use another sentence. For example: HIvchuqmoH; verengan Duj 'oH DoS'e' they cause each other to attack; the target is the Ferengi ship.

-- 
SuStel
http://trimboli.name