If a starship's mobility wasn't a concern (e.g., waiting at a rendevous point, the starship is docked), would it be reasonable to run [RT - Into the Storm]'s [Energistic Conversion Matrix] in reverse to represent directing the engine's Power elsewhere? Light research shows that Defence Monitors do perform a similar task to accommodate otherwise inappropriate weapon systems. This has the effect of generating up to 25/20/15 Power based on Hull class, though the ship would have to spend time warming up the engines before disembarking again (narratively, half an hour or longer; mechanically, one or more Rounds).
Where could I find written rules for towing Components or whole ships, in the books or otherwise? The only notable mention I recall is in the [salvage System]'s description from [RT - Battlefleet Koronus]. I imagine there would be a Speed and Manoeuvrability hit, but there many other aspects to consider as well, such as Void Shield and Gellar/Geller Field interactions.
Based on some of the comments I see floating around, [battlefleet Gothic] seems to contain more in-depth starship rules, but I only have access to the Rogue Trader line. A penny for your thoughts.