And there we have it, folks! R5!

Merry christmas, brave servants of the EMPRAH

I had to sacrifice sound quality a tiny bit to keep the download size below 25mb, and actually managed to reduce it a little since R4.5. The loss shouldn't be too noticeable though.

×× Tuned the bolter scripts to spawn and instantly gib a MOSRotating rather than generate all the shrapnel as part of the script itself. This mostly means it'll be easier for me to rebalance them if necessary, and allows for impact/explosion sounds.
×× A moment of laxity spawns a lifetime of heresy. The Emperor's Finest are now on the field, packing heavier armour and a helmet that can't be broken off. They're a little slow though.
×× Cleaned up and reorganized the voice-over and sound effect files, added hurt/pain sounds for fall/impact damage to all actors. Added new impact SFX for portable launcher.
×× Assault Marine Jet Crash mode, code/script by Asklar and Coops9753. Hold crouch and jump to fly rapidly in the direction you are aiming, doubletap crouch to airbrake and come to a complete halt. Use with extreme caution, especially indoors.
×× Weapon and actor prices slashed fairly significantly.
×× Consolidated gib and plasma weapon coding, and some other minor cleanup work. New plasma pistol/plasma rifle shot impact sounds!
×× AI tweaked a little, actors besides pods, turrets and normal Guardsmen have slow health regeneration now. Speed varies with unit type: some heal faster than others; Terminators and SM Officer/Brain types heal fastest, then Commissars/Marines, then Kasrkin/Scouts/IG Sergeants.
×× Shadow their skies! Thanks to Techpriest Asklar, artillery support from the Imperial Guard is now available, with a side-order of Whirlwind Missiles. Designators may be delivered by the special designator craft (select it quickly after it 'arrives' or it'll 'fly off' again) or carried by infantry and thrown. After the audio cue, strikes take 3 seconds to arrive. Use them well.
××× Thudd Designator: Calls down a hail of 80 (eighty!) explosive mortar rounds over a fairly wide area. Good against light infantry, but ineffective against armoured units like Dummy Dreads.
××× Basilisk Designator: Calls down a short barrage of standard Basilisk shells over a tighter area. Good against infantry and dreads, but less effective against fortified structures.
××× Earthshaker Designator: Calls down a single high-powered Basilisk shell directly on-target. Will pretty much kill anything caught in the blast radius; designed for punching a hole in heavy fortifications, either to take out HVTs or facilitate entry maneuvers.
××× Whirlwind Designator: Calls down a fairly precise barrage of 18 Whirlwind Missiles that are good against infantry and armoured targets, but are somewhat lacking against fortifications.
××× Heavy Whirlwind Designator: Calls down 6 heavier missiles from a Land Raider Helios. The additional payload space is filled with promethium that splashes over the target area and burns violently, creating a flaming hazard to impede enemy movement.
××× Due to calibration errors that result in a serious malfunction in battlefield control systems, orbital laser lance strikes are currently unavailable to commanders. Rest assured the Mechanicus are working to fix this problem as fast as possible.

Ed: I made a couple of minor pathing mistakes again, a fixed version is up. If you get filepath errors, redownload!