Kampfgruppe Engel: Desert milita taskforce

Here we have my small desert milita warband. The collection at the moment.
A really unique collection of bits that resulted in this.
The miniatures have been showed on this blog previously but here we have them together.

The plan is to use them in 40k with the Tyranid Cultist rules but skip all the Tyranid things.

I want to be able to use them in 30k Horus Heresy in the future also but I might need to modify some things with the lists for that.
The infantry could be used as Grenadiers that packs more weaponry then the standard crappy grunts and the trucks could be used as the Cargo-8 Haulers with the Armoured Container upgrade. But I might need to modify the model so its not equipped with Autocannons any more but Heavy stubbers as the rules. Or I might house rule it and add the point difference to upgrade a Heavy stubber to an Autocannon as a Heavy weapons team.
The problem is the Ridgerunner, I havnt found any rules that it could fit under.