Hello. I have 2 rules in question.

the first is that in deathwatch it says the subtypes do not matter. it only states you can perform 2 different half actions and decided by the gm any free actions. My friends and I just started useing the first founding book and reguarding the white scar librarians they seem to be able to do more then anyone. their howling wind counts as a free action and because of that we assume I could then cast smite as it is a half action and then even shoot because that is listed as a different half action. all that seems to work because it states subtypes are not used for anything but what you cant do in certain sitiations. let me know your thoughts.

Also for the white scars, their power lance gives a bonus to chargeing while on a bike or beast. I dont see that option in any dw book for bikes and I see nothing for beasts. any help there?

One psychic power can be activated per round, unless there's another rule that EXPLICITLY states otherwise. And I don't remember the 'subtypes don't matter' thing- you can only make one attack subtype action per round, which includes certain psychic powers- those that target foes, I believe. Rites of Battle has rules for bikes, and a charge action on a bike would be the same as a charge action anywhere else- move charge speed, gain a +10 to hit with your melee attack. As to beasts, I know there's some rules for beasts in the Dark Heresy Apocrypha on vehicles, but other than that, it's up for homebrewing.

The subtype info is on page 236 of the corebook. As for the bike, I only see rules on tactical speed in combat. If anyone knows a page showing other movement actions please let me know.

You're misinterpreting the action subtype rules. It's not saying that they don't apply to Astartes, it's saying that all they do is tell you what a character can do in a given situation- and 'in a round' is a given situation.

Alright I understand. But does it say somewhere in the dw book specificly that only one subtype can be used? and about only doing one psyhic power? or is that from previous games. I need page numbers for solid evidence for everyone to agree. Also since the white scar ability is a free action. is it alllowable to cast it in melee and knock them back thus breaking melee and if needed make a run action?

Vehicle movement is in Rites of Battle P.166 with lots of different options though none are specificaly called 'charging' but they do have ramming.

The action subtype thing is where it says under half actions and using actions that a character can take 'two different Half Actions' and is made plain in the errata in a kind of odd place.

"Power Format (page 189): Add the following sentence to
the Action entry: “If the power targets an opponent or does damage
to an opponent, the power gains the Attack Subtype (see page 237),
and thus cannot be combined with other Attack Subtype actions (such
as Full-Auto Burst or Semi-Auto Burst, and so on)."