Lapp Ski Archers - infantry on ski !
These guys were Lapp tribesmen armed with compound bows and using skis to travel quickly attacking their foes during winters i.e. almost always.
Small numbers, horde formation, loose formation. Armed with daggers and bows. Rather good morale.
Very high bonus to when attacking in snow, vulnerable to cavalry and should be rather weak when fighting somewhere where is no snow - simply give them massive bonus to attack in snow, but pathetic usual stats. VERY fast.
Might I ask why a unit like this is needed ? it is not like they played any major roll during any of the wars sweden took part in.

no or almost no armour, so had problems with enemy armoured cuirassiers e.g. Lutzen 1632
But in the earlier part of the thirty years war the hasburgan cavalry still fought in a "spanish" formation (sorry I can't rembere the correct name for it now) when it would ride forward close too the enemy and then the first rank would fire off there pistols and them ove too the last rank while the second rank would fire and them move back too the last rank and etc when they tried too do this against the swedish cavalry the swedes would just charge on them and beat them in close combat.

Swedish Pikemen - very unpopular unit amongst the Swedes, but essential.
I have seen no mentione anywere about the swedish pikes beeing unpopular by the general atleast sure it might be a unit type that recived the highest number of casualties but the swedish pike units showed time and time again that they were well disicplined and brave. The smaller swedish units tottaly devestated imperial pikmen in "spanish formations" and after some battle against the swedish army the hasburgan army changed too the same formations as the swedish used as it was so superior.

Cannons? Adolf the great introduced smaller mobile cannons that were used in a close support of the infantry units are the any plans to simulate this?

Well too tired tght now but I belive it is important to reconise the swedish army for what it was duriing most of the 17th century: a well oiled killing machine that used for a long time superior tactics and organisation then it's foes.