No, that's totally impossible, and even if I could, is what I am avoid.
But still, why use Subach_Impact? Maxim_Impact is more logical for the Avenger, as is Kayser_Impact for the Banshee, MS_Impact for the Flail, etc.
I have no logic to follow, I explained I didn't play FS1, neither ported it's weapon to S:AH.
There wasn't a xxxxxxxx_Impact to replace, and I didn't know it was an enhanced version of FS1 weaponry, however I pay attention to the TBLs:
+Tech Description:
XSTR("The Avenger cannon was completed by Terran and Vasudan scientists as a joint project following the end of the Terran-Vasudan War, and a rising number of encounters with the Shivans. The EA uses this more refined but slightly less powerful version as its standard armament for its own breed of fighters. It is roughly equivalent to the Subach HL-12 in power.", -1)
$end_multi_text
It has already the colour to match a Vasudan weapon, the Vapula is used for Terran Turrets, and some Shivan weapons, I don't really see that these weapons are more related to the Avenger than a Subach.
Subach HL-12: Subach HL-7
Luyten D-9: Subach (read tech description)
Mekhu HL-12: Mekhu HL-7
Avenger T2: FS1 Avenger (subach currently)
Adv Disruptor: Akheton SDG
Mace: Morning Star
Prometheus: Prometheus R
Prometheus Adv: Prometheus S
Hastor: Maxim
Ripper: Maxim
Kayser Adv: UD-8 Kayser
Khonsu GV-5: UD-8 Kayser
There are no Circe or Lamprey matchs.