So I'm having a major problem here. Every time I walk into dimhollow crypt the game just crashes, this has broken dawn guard already for me.

It was a major problem during beta testing, a lot of us sent in game saves or review.

I hoped they would have fixed it.... But.. There is only so much you can do, the problem was rectified after getting lucky. Change the conditions when you enter. Weapons out or sheathed and stuff like that. The problem seems to be not an easy one for them to fix whatever is causing it

Thanks for the help, I took all my gear off and it worked. Now I can enjoy Dawnguard

Yup, have fun! I'm glad that this trick always seems to counteract the bug.