Experts, advice needed to get Canadian Landing Stamp, eventhough I got US GC.

[vsshah]

Dear Experts,

I have got USA Green card this month. And I will get my canadian landing paper within 1 month.

My brother(He is 27) is planning to apply for Canadian PR.
So, If I have Canadian landing stamp. He can get 5 extra points under adaptability (on brother is in Canada).

So, I am planning to visit Canada and get 'landing stamp' on my passport.

I have already I-551 stamp(USA Greencard) on my passport.

1. When I will enter in Canada, Can my USA GC affect 'Landing Process to Canada' ?

2. When I will enter in Canada, Can 'landing stamp of Canada' affect my USA GC ?

3. When I will enter back in USA, Can 'landing stamp of Canada' affect my USA GC ?

4. What way I should choose to enter in Canada(Air or Road-detroit) ?

Please guide me, it will help my brother to increase his points and me to maintain my USA GC. Suggest me any Web page to get more info.

Thanks, Any answer is appreciated.

vsshah.