Ok, lots of incorrect information here.
The Hades drill DOES have rules for regular IG. They are found in IA1(second edition), and include the drill's special infantry squad (no longer a codex veteran squad).
The regular IG rules are NOT the same as the IA:Vraks rules that the DKoK version uses. They're still an older version where the drill is a separate vehicle, arrives a turn before the infantry squad, etc. IOW, the massively over-nerfed rules that FW published in response to the (entirely unjustified) complaints that the old version was overpowered. So, technically by RAW you can still use the drill in a regular IG army, but you don't want to.
Your best hope is probably to convince your opponent to let you use the IA1 infantry squad in your C:IG army but with the IA:Vraks rules for the drill itself, since RAI they're pretty clearly supposed to be an update.
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